{
    "document": {
        "category": "csaf_base",
        "csaf_version": "2.0",
        "distribution": {
            "tlp": {
                "label": "WHITE"
            }
        },
        "lang": "en",
        "notes": [
            {
                "category": "legal_disclaimer",
                "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
            }
        ],
        "publisher": {
            "category": "coordinator",
            "contact_details": "cert@ncsc.nl",
            "name": "National Cyber Security Centre",
            "namespace": "https://www.ncsc.nl/"
        },
        "title": "CVE-2026-32239",
        "tracking": {
            "current_release_date": "2026-03-23T04:15:03.244773Z",
            "generator": {
                "date": "2026-02-17T15:00:00Z",
                "engine": {
                    "name": "V.E.L.M.A",
                    "version": "1.7"
                }
            },
            "id": "CVE-2026-32239",
            "initial_release_date": "2026-03-12T20:25:45.920999Z",
            "revision_history": [
                {
                    "date": "2026-03-12T20:25:45.920999Z",
                    "number": "1",
                    "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (5).| CWES updated (1)."
                },
                {
                    "date": "2026-03-12T20:25:52.920590Z",
                    "number": "2",
                    "summary": "NCSC Score created."
                },
                {
                    "date": "2026-03-12T20:39:01.064334Z",
                    "number": "3",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (5).| CWES updated (1)."
                },
                {
                    "date": "2026-03-12T20:39:03.677075Z",
                    "number": "4",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-13T07:37:35.874678Z",
                    "number": "5",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-13T12:42:38.146298Z",
                    "number": "6",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products created (1).| Products connected (1)."
                },
                {
                    "date": "2026-03-13T12:42:40.067341Z",
                    "number": "7",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-13T14:13:35.626124Z",
                    "number": "8",
                    "summary": "Source created.| CVE status created. (valid)| EPSS created."
                },
                {
                    "date": "2026-03-13T14:13:37.878742Z",
                    "number": "9",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-13T16:39:11.967235Z",
                    "number": "10",
                    "summary": "Unknown change."
                },
                {
                    "date": "2026-03-14T00:27:44.032373Z",
                    "number": "11",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (2).| Product Identifiers created (1).| Product Remediations created (2).| References created (7).| CWES updated (1).| Vendor_assessment created."
                },
                {
                    "date": "2026-03-14T00:27:53.491821Z",
                    "number": "12",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-18T17:26:16.041790Z",
                    "number": "13",
                    "summary": "CVSS created.| Products connected (1).| Product Identifiers created (1)."
                },
                {
                    "date": "2026-03-18T17:26:17.896913Z",
                    "number": "14",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-20T09:31:32.745994Z",
                    "number": "15",
                    "summary": "Source connected.| CVE status created. (valid)| EPSS created."
                }
            ],
            "status": "interim",
            "version": "15"
        }
    },
    "product_tree": {
        "branches": [
            {
                "branches": [
                    {
                        "branches": [
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/<1.4.0",
                                "product": {
                                    "name": "vers:unknown/<1.4.0",
                                    "product_id": "CSAFPID-5810749",
                                    "product_identification_helper": {
                                        "cpe": "cpe:2.3:a:capnproto:capnproto:*:*:*:*:*:*:*:*"
                                    }
                                }
                            }
                        ],
                        "category": "product_name",
                        "name": "Cap'n Proto"
                    }
                ],
                "category": "vendor",
                "name": "Cap'n Proto"
            },
            {
                "branches": [
                    {
                        "branches": [
                            {
                                "category": "product_version_range",
                                "name": "vers:rpm/10",
                                "product": {
                                    "name": "vers:rpm/10",
                                    "product_id": "CSAFPID-2858634",
                                    "product_identification_helper": {
                                        "cpe": "cpe:/o:redhat:enterprise_linux:10"
                                    }
                                }
                            }
                        ],
                        "category": "product_name",
                        "name": "Red Hat Enterprise Linux 10"
                    },
                    {
                        "branches": [
                            {
                                "branches": [
                                    {
                                        "category": "product_version_range",
                                        "name": "vers:rpm/unknown",
                                        "product": {
                                            "name": "vers:rpm/unknown",
                                            "product_id": "CSAFPID-5826730"
                                        }
                                    }
                                ],
                                "category": "product_name",
                                "name": "capnproto"
                            }
                        ],
                        "category": "product_family",
                        "name": "Red Hat Enterprise Linux 10"
                    }
                ],
                "category": "vendor",
                "name": "Red Hat"
            },
            {
                "branches": [
                    {
                        "branches": [
                            {
                                "branches": [
                                    {
                                        "category": "product_version_range",
                                        "name": "vers:deb/unknown",
                                        "product": {
                                            "name": "vers:deb/unknown",
                                            "product_id": "CSAFPID-5814530"
                                        }
                                    }
                                ],
                                "category": "product_name",
                                "name": "capnproto"
                            }
                        ],
                        "category": "product_family",
                        "name": "bookworm"
                    },
                    {
                        "branches": [
                            {
                                "branches": [
                                    {
                                        "category": "product_version_range",
                                        "name": "vers:deb/unknown",
                                        "product": {
                                            "name": "vers:deb/unknown",
                                            "product_id": "CSAFPID-1390524"
                                        }
                                    }
                                ],
                                "category": "product_name",
                                "name": "capnproto"
                            }
                        ],
                        "category": "product_family",
                        "name": "bullseye"
                    }
                ],
                "category": "vendor",
                "name": "Debian"
            }
        ]
    },
    "vulnerabilities": [
        {
            "cve": "CVE-2026-32239",
            "cwe": {
                "id": "CWE-190",
                "name": "Integer Overflow or Wraparound"
            },
            "notes": [
                {
                    "category": "description",
                    "text": "Cap'n Proto is a data interchange format and capability-based RPC system. Prior to 1.4.0, a negative Content-Length value was converted to unsigned, treating it as an impossibly large length instead. In theory, this bug could enable HTTP request/response smuggling. This vulnerability is fixed in 1.4.0.",
                    "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-32239"
                },
                {
                    "category": "description",
                    "text": "Cap'n Proto is a data interchange format and capability-based RPC system. Prior to 1.4.0, a negative Content-Length value was converted to unsigned, treating it as an impossibly large length instead. In theory, this bug could enable HTTP request/response smuggling. This vulnerability is fixed in 1.4.0.",
                    "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-32239"
                },
                {
                    "category": "description",
                    "text": "Cap'n Proto is a data interchange format and capability-based RPC system. Prior to 1.4.0, a negative Content-Length value was converted to unsigned, treating it as an impossibly large length instead. In theory, this bug could enable HTTP request/response smuggling. This vulnerability is fixed in 1.4.0.",
                    "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-32239"
                },
                {
                    "category": "description",
                    "text": "A flaw was found in the KJ-HTTP component of Cap’n Proto. When processing HTTP messages, a negative Content-Length value could be implicitly converted to an unsigned integer, resulting in an extremely large length value. An attacker could exploit this behavior by sending specially crafted HTTP messages containing negative Content-Length values. This may lead to inconsistent interpretation of HTTP message boundaries and could theoretically enable HTTP request or response smuggling scenarios in applications that rely on Cap’n Proto’s HTTP implementation.\nThis issue is rated Moderate severity by Red Hat Product Security, because exploitation requires the attacker to craft malformed HTTP messages containing negative Content-Length values that trigger the integer conversion behavior in the KJ-HTTP parser. Such malformed inputs are not typically generated during normal HTTP communication and may be rejected or normalized by intermediate HTTP components such as proxies or load balancers or front-end servers before reaching the affected parser. The potential impact is also limited to inconsistent interpretation of HTTP request boundaries, which could enable limited request smuggling scenarios depending on application architecture. The vulnerability does not directly allow remote code execution or service crashes.",
                    "title": "redhat - https://access.redhat.com/security/cve/CVE-2026-32239"
                },
                {
                    "category": "other",
                    "text": "0.00044",
                    "title": "EPSS"
                },
                {
                    "category": "other",
                    "text": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
                    "title": "CVSSV4"
                },
                {
                    "category": "other",
                    "text": "6.3",
                    "title": "CVSSV4 base score"
                },
                {
                    "category": "other",
                    "text": "4.5",
                    "title": "NCSC Score"
                },
                {
                    "category": "other",
                    "text": "Is related to (a version of) an uncommon product",
                    "title": "NCSC Score top decreasing factors"
                },
                {
                    "category": "details",
                    "text": "Severity: 2\n",
                    "title": "Vendor assessment"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-5810749",
                    "CSAFPID-1390524",
                    "CSAFPID-5814530",
                    "CSAFPID-2858634",
                    "CSAFPID-5826730"
                ]
            },
            "references": [
                {
                    "category": "external",
                    "summary": "Source - nvd",
                    "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32239"
                },
                {
                    "category": "external",
                    "summary": "Source raw - nvd",
                    "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-32239"
                },
                {
                    "category": "external",
                    "summary": "Source - cveprojectv5",
                    "url": "https://www.cve.org/CVERecord?id=CVE-2026-32239"
                },
                {
                    "category": "external",
                    "summary": "Source raw - cveprojectv5",
                    "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/32xxx/CVE-2026-32239.json"
                },
                {
                    "category": "external",
                    "summary": "Source - debian",
                    "url": "https://security-tracker.debian.org/tracker/CVE-2026-32239"
                },
                {
                    "category": "external",
                    "summary": "Source - first",
                    "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-32239"
                },
                {
                    "category": "external",
                    "summary": "Source raw - first",
                    "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0"
                },
                {
                    "category": "external",
                    "summary": "Source - redhat",
                    "url": "https://access.redhat.com/security/cve/CVE-2026-32239"
                },
                {
                    "category": "external",
                    "summary": "Source raw - redhat",
                    "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-32239.json"
                },
                {
                    "category": "external",
                    "summary": "Source - first",
                    "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd; redhat",
                    "url": "https://capnproto.org/capnproto-c++-1.4.0.tar.gz"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd; redhat",
                    "url": "https://capnproto.org/capnproto-c++-win32-1.4.0.zip"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd; redhat",
                    "url": "https://github.com/capnproto/capnproto/commit/2744b3c012b4aa3c31cefb61ec656829fa5c0e36"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd; redhat",
                    "url": "https://github.com/capnproto/capnproto/commit/e929f0ba7901a6b8f4b5ba9a4db00af43288cbb0"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd; redhat",
                    "url": "https://github.com/capnproto/capnproto/security/advisories/GHSA-qjx3-pp3m-9jpm"
                },
                {
                    "category": "external",
                    "summary": "Reference - redhat",
                    "url": "https://www.cve.org/CVERecord?id=CVE-2026-32239"
                },
                {
                    "category": "external",
                    "summary": "Reference - redhat",
                    "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32239"
                }
            ],
            "remediations": [
                {
                    "category": "mitigation",
                    "details": "Red Hat is not aware of a practical temporary workaround that fully mitigates this issue or meets Red Hat Product Security's standards for usability, deployment, applicability, or stability.",
                    "product_ids": [
                        "CSAFPID-2858634",
                        "CSAFPID-5826730"
                    ]
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
                        "baseScore": 6.5,
                        "baseSeverity": "MEDIUM"
                    },
                    "products": [
                        "CSAFPID-1390524",
                        "CSAFPID-2858634",
                        "CSAFPID-5810749",
                        "CSAFPID-5814530",
                        "CSAFPID-5826730"
                    ]
                }
            ],
            "title": "CVE-2026-32239"
        }
    ]
}