{ "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-2026-21882", "tracking": { "current_release_date": "2026-04-01T18:48:14.043200Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-21882", "initial_release_date": "2026-03-02T18:40:10.377714Z", "revision_history": [ { "date": "2026-03-02T18:40:10.377714Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-03-02T18:40:12.265083Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-03-02T19:38:28.859630Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (2).| CWES updated (1)." }, { "date": "2026-03-02T19:38:33.661670Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-03-02T20:25:07.130266Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)." }, { "date": "2026-03-02T20:25:10.846130Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-03-02T20:39:55.233744Z", "number": "7", "summary": "Unknown change." }, { "date": "2026-03-02T22:40:40.027487Z", "number": "8", "summary": "References created (1)." }, { "date": "2026-03-03T06:11:53.047380Z", "number": "9", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (4).| CWES updated (1)." }, { "date": "2026-03-03T07:35:11.426870Z", "number": "10", "summary": "NCSC Score updated." }, { "date": "2026-03-03T23:05:27.370748Z", "number": "11", "summary": "Source created.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-03T23:05:34.848799Z", "number": "12", "summary": "NCSC Score updated." }, { "date": "2026-03-05T18:44:39.310598Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-03-20T10:02:43.266344Z", "number": "14", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-20T10:02:46.508318Z", "number": "15", "summary": "NCSC Score updated." }, { "date": "2026-04-01T12:37:27.507495Z", "number": "16", "summary": "NCSC Score updated." }, { "date": "2026-04-01T18:47:55.347638Z", "number": "17", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (2).| References created (5).| CWES updated (1)." }, { "date": "2026-04-01T18:47:57.432747Z", "number": "18", "summary": "NCSC Score updated." } ], "status": "interim", "version": "18" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/0.2.0", "product": { "name": "vers:unknown/0.2.0", "product_id": "CSAFPID-5982412" } }, { "category": "product_version_range", "name": "vers:unknown/<0.2.0", "product": { "name": "vers:unknown/<0.2.0", "product_id": "CSAFPID-5982413" } } ], "category": "product_name", "name": "cargo/theshit" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<0.2.0", "product": { "name": "vers:unknown/<0.2.0", "product_id": "CSAFPID-5754842" } } ], "category": "product_name", "name": "theshit" } ], "category": "vendor", "name": "AsfhtgkDavid" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-21882", "cwe": { "id": "CWE-250", "name": "Execution with Unnecessary Privileges" }, "notes": [ { "category": "description", "text": "### Impact\n\n**Vulnerability Type:** Local Privilege Escalation (LPE) / Improper Privilege Management / Arbitrary Command Execution.\n\nThe application automatically re-executes the previously failed command but does not properly drop elevated privileges during this process.\n\nWhen the tool is executed with `sudo` or otherwise runs with an effective UID of root, it records the last executed command and attempts to rerun it. However, the application fails to restore the original unprivileged user context before re-executing the command. As a result, the retried command is executed with root privileges, even if the original command was issued by an unprivileged user.\n\nThis allows a local attacker to intentionally trigger a failed command under elevated execution and gain arbitrary command execution as root via the retry mechanism.\n\n**Who is impacted:**\nAny system where this tool is executed with elevated privileges is affected. The risk is especially high in environments where the tool is permitted to run via `sudo`, including configurations with `NOPASSWD`, as an unprivileged user can escalate privileges to root without additional interaction.\n\n### Proof of Concept\n\nTo verify the vulnerability without a shell, attempt to create a file in a root-protected directory.\n\n**1. Verify the file does not exist**\n```bash\nsudo ls /root/proof_of_lpe\n# Output: No such file or directory\n```\n\n**2. Run the vulnerable command**\n```bash\nsudo bash -c \"SH_PREV_CMD='touch /root/proof_of_lpe' target/release/theshit fix\"\n```\n\n**3. Check if the file was created by root**\n```bash\nsudo ls -l /root/proof_of_lpe\n```\n\n**Expected Result:**\nThe command succeeds silently, and the file `/root/proof_of_lpe` is created, confirming arbitrary command execution with root privileges.\n\n### Patches\n\nThe issue has been fixed in version **0.1.2**.\n\nThe patch ensures that privilege levels are correctly handled during command re-execution. Before retrying any previously executed command, the application now explicitly resets the effective UID and GID to the original invoking user.\n\n### Workarounds\n\nIf upgrading is not possible, users should avoid executing the application with `sudo` or as the root user.\n\nAs a temporary mitigation, administrators should restrict the use of the tool in privileged contexts and ensure it is not included in `sudoers` configurations, particularly with `NOPASSWD`. Running the tool strictly as an unprivileged user prevents exploitation of the retry mechanism.\n\n### References\n\n* [Commit fixing the issue](https://github.com/AsfhtgkDavid/theshit/commit/5293957b119e55212dce2c6dcbaf1d7eb794602a)\n* CWE-269: Improper Privilege Management\n* CWE-273: Improper Check for Dropped Privileges\n* CWE-250: Execution with Unnecessary Privileges", "title": "github - https://github.com/advisories/GHSA-2j3p-gqw5-g59j" }, { "category": "description", "text": "theshit is a command-line utility that automatically detects and fixes common mistakes in shell commands. Prior to version 0.2.0, improper privilege dropping allows local privilege escalation via command re-execution. This issue has been patched in version 0.2.0.", "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-21882" }, { "category": "description", "text": "theshit is a command-line utility that automatically detects and fixes common mistakes in shell commands. Prior to version 0.2.0, improper privilege dropping allows local privilege escalation via command re-execution. This issue has been patched in version 0.2.0.", "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-21882" }, { "category": "description", "text": "theshit is a command-line utility that automatically detects and fixes common mistakes in shell commands. Prior to version 0.2.0, improper privilege dropping allows local privilege escalation via command re-execution. This issue has been patched in version 0.2.0.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-21882.json?alt=media" }, { "category": "description", "text": "**Vulnerability Type:** Local Privilege Escalation (LPE) / Improper Privilege Management / Arbitrary Command Execution.\n\nThe application automatically re-executes the previously failed command but does not properly drop elevated privileges during this process.\n\nWhen the tool is executed with `sudo` or otherwise runs with an effective UID of root, it records the last executed command and attempts to rerun it. However, the application fails to restore the original unprivileged user context before re-executing the command. As a result, the retried command is executed with root privileges, even if the original command was issued by an unprivileged user.\n\nThis allows a local attacker to intentionally trigger a failed command under elevated execution and gain arbitrary command execution as root via the retry mechanism.\n\n**Who is impacted:**\nAny system where this tool is executed with elevated privileges is affected. The risk is especially high in environments where the tool is permitted to run via `sudo`, including configurations with `NOPASSWD`, as an unprivileged user can escalate privileges to root without additional interaction.", "title": "gitlab - https://gitlab.com/api/v4/projects/25847700/repository/files/cargo%2Ftheshit%2FCVE-2026-21882.yml/raw" }, { "category": "other", "text": "0.00017", "title": "EPSS" }, { "category": "other", "text": "4.4", "title": "NCSC Score" }, { "category": "other", "text": "Is related to CWE-269 (Improper Privilege Management), There is product data available from source Cveprojectv5", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "There is cwe data available from source Nvd, Is related to CWE-250 (Execution with Unnecessary Privileges)", "title": "NCSC Score top decreasing factors" } ], "product_status": { "fixed": [ "CSAFPID-5982412" ], "known_affected": [ "CSAFPID-5754842", "CSAFPID-5982413" ] }, "references": [ { "category": "external", "summary": "Source - github", "url": "https://github.com/advisories/GHSA-2j3p-gqw5-g59j" }, { "category": "external", "summary": "Source raw - github", "url": "https://api.github.com/advisories/GHSA-2j3p-gqw5-g59j" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://www.cve.org/CVERecord?id=CVE-2026-21882" }, { "category": "external", "summary": "Source raw - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/21xxx/CVE-2026-21882.json" }, { "category": "external", "summary": "Source - nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21882" }, { "category": "external", "summary": "Source raw - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-21882" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-21882.json?alt=media" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-21882" }, { "category": "external", "summary": "Source raw - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - gitlab", "url": "https://gitlab.com/api/v4/projects/25847700/repository/files/cargo%2Ftheshit%2FCVE-2026-21882.yml/raw" }, { "category": "external", "summary": "Reference - cveprojectv5; github; gitlab; nvd; osv", "url": "https://github.com/AsfhtgkDavid/theshit/security/advisories/GHSA-2j3p-gqw5-g59j" }, { "category": "external", "summary": "Reference - cveprojectv5; github; gitlab; nvd; osv", "url": "https://github.com/AsfhtgkDavid/theshit/commit/5293957b119e55212dce2c6dcbaf1d7eb794602a" }, { "category": "external", "summary": "Reference - github; gitlab", "url": "https://github.com/advisories/GHSA-2j3p-gqw5-g59j" }, { "category": "external", "summary": "Reference - github; gitlab; osv", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21882" }, { "category": "external", "summary": "Reference - osv", "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21882.json" }, { "category": "external", "summary": "Reference - gitlab", "url": "https://github.com/AsfhtgkDavid/theshit" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-5754842", "CSAFPID-5982413" ] } ], "title": "CVE-2026-21882" } ] }