{ "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-2026-33353", "tracking": { "current_release_date": "2026-03-29T01:17:00.496252Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-33353", "initial_release_date": "2026-03-21T01:08:18.225683Z", "revision_history": [ { "date": "2026-03-21T01:08:18.225683Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)." }, { "date": "2026-03-21T01:08:22.304159Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-03-24T20:53:51.067410Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-03-24T20:53:55.208020Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-03-24T20:54:25.182278Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (3).| CWES updated (1)." }, { "date": "2026-03-24T20:54:29.053231Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-03-25T14:39:31.858734Z", "number": "7", "summary": "Unknown change." }, { "date": "2026-03-25T14:39:33.817502Z", "number": "8", "summary": "NCSC Score updated." }, { "date": "2026-03-25T18:13:00.681585Z", "number": "9", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| References created (1).| CWES updated (1)." }, { "date": "2026-03-25T18:13:41.492495Z", "number": "10", "summary": "Source created.| CVE status created. (valid)| Description created for source.| References created (1)." }, { "date": "2026-03-25T22:25:29.588813Z", "number": "11", "summary": "CVSS created.| Products created (1).| Product Identifiers created (1).| Exploits created (1)." }, { "date": "2026-03-25T22:25:35.133975Z", "number": "12", "summary": "NCSC Score updated." }, { "date": "2026-03-26T00:50:28.875618Z", "number": "13", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-28T07:58:19.249980Z", "number": "14", "summary": "References created (3)." }, { "date": "2026-03-28T07:58:23.539438Z", "number": "15", "summary": "NCSC Score updated." }, { "date": "2026-03-28T08:11:13.511182Z", "number": "16", "summary": "References removed (3)." }, { "date": "2026-03-29T01:16:44.178469Z", "number": "17", "summary": "References created (3)." } ], "status": "interim", "version": "17" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/>=0.6.0|<0.11.6", "product": { "name": "vers:unknown/>=0.6.0|<0.11.6", "product_id": "CSAFPID-5910689", "product_identification_helper": { "cpe": "cpe:2.3:a:charm:soft_serve:*:*:*:*:*:go:*:*" } } } ], "category": "product_name", "name": "Soft Serve" } ], "category": "vendor", "name": "Charm" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/>=0.6.0|<0.11.6", "product": { "name": "vers:unknown/>=0.6.0|<0.11.6", "product_id": "CSAFPID-5902831" } } ], "category": "product_name", "name": "soft-serve" } ], "category": "vendor", "name": "charmbracelet" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-33353", "cwe": { "id": "CWE-862", "name": "Missing Authorization" }, "notes": [ { "category": "description", "text": "### Summary\nAn authorization flaw in `repo import` allows any authenticated SSH user to clone a server-local Git repository, including another user's private repo, into a new repository they control. This breaks the private-repository confidentiality boundary and should be treated as High severity.\n\n### Details\nRepo import checks authorization only for the destination repository name, not for the source remote. The destination-side authorization comes from [`pkg/ssh/cmd/cmd.go:172`](https://github.com/charmbracelet/soft-serve/blob/main/pkg/ssh/cmd/cmd.go#L172), which calls [`pkg/backend/user.go:46`](https://github.com/charmbracelet/soft-serve/blob/main/pkg/backend/user.go#L46). If the destination repo does not already exist, any authenticated user is granted `ReadWriteAccess` at [`pkg/backend/user.go:94`](https://github.com/charmbracelet/soft-serve/blob/main/pkg/backend/user.go#L94).\n\nThe import command then passes the user-controlled `REMOTE` into [`pkg/backend/repo.go:102`](https://github.com/charmbracelet/soft-serve/blob/main/pkg/backend/repo.go#L102). In vulnerable `HEAD`, `git.Clone(remote, rp, copts)` is reached without validating that `remote` is actually a network remote. As a result, a user can supply a server filesystem path such as `$DATA_PATH/repos/secret.git` and cause the server to clone its own local bare repository into a new repo owned by the attacker.\n\nThe relevant vulnerable flow is:\n- [`pkg/ssh/cmd/import.go`](https://github.com/charmbracelet/soft-serve/blob/main/pkg/ssh/cmd/import.go)\n- [`pkg/ssh/cmd/cmd.go:172`](https://github.com/charmbracelet/soft-serve/blob/main/pkg/ssh/cmd/cmd.go#L172)\n- [`pkg/backend/user.go:94`](https://github.com/charmbracelet/soft-serve/blob/main/pkg/backend/user.go#L94)\n- [`pkg/backend/repo.go:102`](https://github.com/charmbracelet/soft-serve/blob/main/pkg/backend/repo.go#L102)\n\n### PoC\nConfiguration:\n- Default local test configuration is sufficient.\n- SSH must be enabled.\n- At least two users are needed: one owner/admin and one low-privilege authenticated user.\n\nReproduction steps:\n1. Start Soft Serve.\n2. As an admin, create a private repo:\n\n```sh\nsoft repo create secret -p\n```\n\n3. Create a second low-privilege user:\n\n```sh\nsoft user create user1 --key \"$USER1_AUTHORIZED_KEY\"\n```\n\n4. Seed the private repo with secret content:\n\n```sh\ngit clone ssh://localhost:$SSH_PORT/secret secret\necho 'top secret' > secret/SECRET.txt\ngit -C secret add SECRET.txt\ngit -C secret commit -m 'first'\ngit -C secret push origin HEAD\n```\n\n5. Confirm the low-privilege user cannot access the private repo directly:\n\n```sh\nusoft repo info secret\n```\n\nExpected result:\n\n```text\nError: repository not found\n```\n\n6. As the low-privilege user, import the server-local bare repo path into a new repo:\n\n```sh\nusoft repo import stolen \"$DATA_PATH/repos/secret.git\" --lfs-endpoint http://example.com\n```\n\n7. Clone the attacker-controlled imported repo and read the secret:\n\n```sh\nugit clone ssh://localhost:$SSH_PORT/stolen stolen-clone\ncat stolen-clone/SECRET.txt\n```\n\nExpected result:\n\n```text\ntop secret\n```\n\nNotes:\n- The `--lfs-endpoint` value is needed to avoid later LFS endpoint handling rejecting the local-path import.\n\n### Impact\nThis is an authorization bypass and confidentiality issue.\n\nAny authenticated SSH user on a multi-user Soft Serve instance can duplicate server-local Git repositories into new repositories they own, even when they are not a collaborator and direct access to the original private repo is denied. The primary impact is unauthorized disclosure of private source code and any secrets committed to those repositories.\n\nImpacted parties:\n- Operators hosting Soft Serve for multiple users or teams\n- Owners of private repositories on the same instance\n- Any deployment where untrusted authenticated users can use `repo import`\n\nPractical impact:\n- Theft of private source code\n- Disclosure of secrets committed to private repos\n- Exposure of unreleased or internal projects\n- Possible follow-on supply-chain risk if stolen code contains credentials or release material", "title": "github - https://api.github.com/advisories/GHSA-xgxp-f695-6vrp" }, { "category": "description", "text": "Soft Serve is a self-hostable Git server for the command line. From version 0.6.0 to before version 0.11.6, an authorization flaw in repo import allows any authenticated SSH user to clone a server-local Git repository, including another user's private repo, into a new repository they control. This issue has been patched in version 0.11.6.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33353" }, { "category": "description", "text": "Soft Serve is a self-hostable Git server for the command line. From version 0.6.0 to before version 0.11.6, an authorization flaw in repo import allows any authenticated SSH user to clone a server-local Git repository, including another user's private repo, into a new repository they control. This issue has been patched in version 0.11.6.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33353.json" }, { "category": "description", "text": "### Summary\nAn authorization flaw in `repo import` allows any authenticated SSH user to clone a server-local Git repository, including another user's private repo, into a new repository they control. This breaks the private-repository confidentiality boundary and should be treated as High severity.\n\n### Details\nRepo import checks authorization only for the destination repository name, not for the source remote. The destination-side authorization comes from [`pkg/ssh/cmd/cmd.go:172`](https://github.com/charmbracelet/soft-serve/blob/main/pkg/ssh/cmd/cmd.go#L172), which calls [`pkg/backend/user.go:46`](https://github.com/charmbracelet/soft-serve/blob/main/pkg/backend/user.go#L46). If the destination repo does not already exist, any authenticated user is granted `ReadWriteAccess` at [`pkg/backend/user.go:94`](https://github.com/charmbracelet/soft-serve/blob/main/pkg/backend/user.go#L94).\n\nThe import command then passes the user-controlled `REMOTE` into [`pkg/backend/repo.go:102`](https://github.com/charmbracelet/soft-serve/blob/main/pkg/backend/repo.go#L102). In vulnerable `HEAD`, `git.Clone(remote, rp, copts)` is reached without validating that `remote` is actually a network remote. As a result, a user can supply a server filesystem path such as `$DATA_PATH/repos/secret.git` and cause the server to clone its own local bare repository into a new repo owned by the attacker.\n\nThe relevant vulnerable flow is:\n- [`pkg/ssh/cmd/import.go`](https://github.com/charmbracelet/soft-serve/blob/main/pkg/ssh/cmd/import.go)\n- [`pkg/ssh/cmd/cmd.go:172`](https://github.com/charmbracelet/soft-serve/blob/main/pkg/ssh/cmd/cmd.go#L172)\n- [`pkg/backend/user.go:94`](https://github.com/charmbracelet/soft-serve/blob/main/pkg/backend/user.go#L94)\n- [`pkg/backend/repo.go:102`](https://github.com/charmbracelet/soft-serve/blob/main/pkg/backend/repo.go#L102)\n\n### PoC\nConfiguration:\n- Default local test configuration is sufficient.\n- SSH must be enabled.\n- At least two users are needed: one owner/admin and one low-privilege authenticated user.\n\nReproduction steps:\n1. Start Soft Serve.\n2. As an admin, create a private repo:\n\n```sh\nsoft repo create secret -p\n```\n\n3. Create a second low-privilege user:\n\n```sh\nsoft user create user1 --key \"$USER1_AUTHORIZED_KEY\"\n```\n\n4. Seed the private repo with secret content:\n\n```sh\ngit clone ssh://localhost:$SSH_PORT/secret secret\necho 'top secret' > secret/SECRET.txt\ngit -C secret add SECRET.txt\ngit -C secret commit -m 'first'\ngit -C secret push origin HEAD\n```\n\n5. Confirm the low-privilege user cannot access the private repo directly:\n\n```sh\nusoft repo info secret\n```\n\nExpected result:\n\n```text\nError: repository not found\n```\n\n6. As the low-privilege user, import the server-local bare repo path into a new repo:\n\n```sh\nusoft repo import stolen \"$DATA_PATH/repos/secret.git\" --lfs-endpoint http://example.com\n```\n\n7. Clone the attacker-controlled imported repo and read the secret:\n\n```sh\nugit clone ssh://localhost:$SSH_PORT/stolen stolen-clone\ncat stolen-clone/SECRET.txt\n```\n\nExpected result:\n\n```text\ntop secret\n```\n\nNotes:\n- The `--lfs-endpoint` value is needed to avoid later LFS endpoint handling rejecting the local-path import.\n\n### Impact\nThis is an authorization bypass and confidentiality issue.\n\nAny authenticated SSH user on a multi-user Soft Serve instance can duplicate server-local Git repositories into new repositories they own, even when they are not a collaborator and direct access to the original private repo is denied. The primary impact is unauthorized disclosure of private source code and any secrets committed to those repositories.\n\nImpacted parties:\n- Operators hosting Soft Serve for multiple users or teams\n- Owners of private repositories on the same instance\n- Any deployment where untrusted authenticated users can use `repo import`\n\nPractical impact:\n- Theft of private source code\n- Disclosure of secrets committed to private repos\n- Exposure of unreleased or internal projects\n- Possible follow-on supply-chain risk if stolen code contains credentials or release material", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGHSA-xgxp-f695-6vrp.json?alt=media" }, { "category": "description", "text": "In Soft Serve, an authenticated repo import can clone server-local private repositories in github.com/charmbracelet/soft-serve", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGO-2026-4788.json?alt=media" }, { "category": "other", "text": "0.00012", "title": "EPSS" }, { "category": "other", "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N", "title": "CVSSV4" }, { "category": "other", "text": "7.1", "title": "CVSSV4 base score" }, { "category": "other", "text": "3.6", "title": "NCSC Score" }, { "category": "other", "text": "Is related to CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "There is exploit data available from source Nvd, Is related to an uncommon product vendor, Is related to (a version of) an uncommon product", "title": "NCSC Score top decreasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-5902831", "CSAFPID-5910689" ] }, "references": [ { "category": "external", "summary": "Source - github", "url": "https://api.github.com/advisories/GHSA-xgxp-f695-6vrp" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33353" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33353.json" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGHSA-xgxp-f695-6vrp.json?alt=media" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGO-2026-4788.json?alt=media" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv", "url": "https://github.com/charmbracelet/soft-serve/security/advisories/GHSA-xgxp-f695-6vrp" }, { "category": "external", "summary": "Reference - github", "url": "https://github.com/advisories/GHSA-xgxp-f695-6vrp" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd", "url": "https://github.com/charmbracelet/soft-serve/commit/c147421caf234bcfc1570c79d728ecbbe5813e55" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd", "url": "https://github.com/charmbracelet/soft-serve/releases/tag/v0.11.6" }, { "category": "external", "summary": "Reference - github", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33353" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-5902831", "CSAFPID-5910689" ] } ], "title": "CVE-2026-33353" } ] }