gitoxide before 0.52.1 Path Traversal via Submodule Name

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gitoxide before 0.52.1 fails to validate submodule names from .gitmodules configuration, allowing path traversal when deriving submodule git directories. Attackers can craft malicious submodule names with traversal segments to redirect state() and open() functions to repositories outside .git/modules, causing repository confusion and inspection of attacker-controlled repositories.

Source published

28 Aug 2026 10:49:36 UTC

Source modified

29 Aug 2026 13:38:27 UTC

Saved here

23 Oct 2026 15:48:27 UTC

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CVE Program Terms of Use

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Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 4.0 · 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS 3.1 · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

gitoxide before 0.52.1 fails to validate submodule names from .gitmodules configuration, allowing path traversal when deriving submodule git directories. Attackers can craft malicious submodule names with traversal segments to redirect state() and open() functions to repositories outside .git/modules, causing repository confusion and inspection of attacker-controlled repositories.

Source published

Aug 28, 2026, 10:49:36 AM (timezone not stated)

Source modified

Aug 29, 2026, 1:38:27 PM (timezone not stated)

Saved here

15 Nov 2026 17:53:04 UTC

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ENISA EUVD · source terms and attribution apply

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Source: euvd · ENISA EUVD · source terms and attribution apply. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

EUVD CVSS 4.0 · 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

gitoxide before 0.52.1 fails to validate submodule names from .gitmodules configuration, allowing path traversal when deriving submodule git directories. Attackers can craft malicious submodule names with traversal segments to redirect state() and open() functions to repositories outside .git/modules, causing repository confusion and inspection of attacker-controlled repositories.

Source published

28 Aug 2026 12:16:37 UTC

Source modified

29 Aug 2026 14:16:37 UTC

Saved here

25 Oct 2026 16:19:10 UTC

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NIST NVD usage terms; underlying source attribution retained

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Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 4.0 · [email protected] · Secondary · 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/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

CVSS 3.1 · [email protected] · Secondary · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

## **Summary** attachments: [pocs.zip](https://github.com/user-attachments/files/26431422/pocs.zip) Submodule names coming from `.gitmodules` are exposed as unvalidated names and are later reused to derive the submodule git directory as: ``` <superproject common_dir>/modules/<submodule name> ``` Because the submodule name is joined directly as a filesystem path component, a name such as `../../../escaped-target.git` escapes `.git/modules` after normalization. The current implementation then uses that escaped path in both `state()` and `open()`. The updated PoC demonstrates the real sink, not just string construction: - `state()` reports `repository_exists=true` for the traversed path; - `open()` returns a repository whose normalized `common_dir()` matches the attacker-chosen repository outside `.git/modules`. ## **Root cause analysis** The relevant flow is: 1. [`gix-submodule/src/access.rs`](https://github.com/GitoxideLabs/gitoxide/blob/v0.52.0/gix-submodule/src/access.rs) exposes unvalidated submodule names from configuration. 2. [`gix/src/submodule/mod.rs`](https://github.com/GitoxideLabs/gitoxide/blob/v0.52.0/gix/src/submodule/mod.rs) derives the git directory by doing `common_dir().join("modules").join(name)` with no confinement check. 3. [`gix/src/submodule/mod.rs`](https://github.com/GitoxideLabs/gitoxide/blob/v0.52.0/gix/src/submodule/mod.rs) uses that derived path during state resolution and repository opening. There is no normalization-and-confinement step between “submodule name from configuration” and “filesystem path used for repository existence checks / open.” As a result, traversal segments in the submodule name directly influence which repository path is inspected and opened. ## **Reproduce steps** Use the attached PoC zip that contains the `pocs/` workspace. 1. Unzip the PoC archive. 2. Enter `pocs/F002`. 3. Run: ``` cargo run --quiet ``` 4. Compare the output with `pocs/F002/result.txt`. Key outputs are: - `submodule_name=../../../escaped-target.git` - `derived_git_dir_raw=.../.git/modules/../../../escaped-target.git` - `derived_git_dir_normalized=.../artifacts/escaped-target.git` - `escaped_target=.../artifacts/escaped-target.git` - `repository_exists=true` - `submodule_opened=true` - `opened_common_dir_normalized=.../artifacts/escaped-target.git` - `normalized_git_dir_matches_target=true` - `opened_common_dir_matches_target=true` - `target_outside_modules_root=true` These outputs show that gitoxide is not only constructing a traversable path string. It is actually using the escaped path for repository existence checks and for opening a repository object. ## **Impact** Confirmed impact: - a malicious submodule name can redirect submodule state inspection away from `.git/modules/<name>` to an attacker-chosen repository path outside `.git/modules`; - `Submodule::state()` can report repository existence for the wrong repository; - `Submodule::open()` can return a repository object backed by that attacker-chosen path. This is best described as a path-traversal / repository-confusion issue in submodule repository resolution. This report does **not** claim command execution from this behavior alone. The demonstrated impact is repository redirection: callers that enumerate, inspect, or operate on submodules can be steered into using the wrong repository. ## **Recommended fix** Two complementary fixes are advisable: 1. do not reuse raw submodule names as filesystem path fragments; - either use a validated/sanitized name for filesystem derivation, - or derive the storage path from a safe identifier instead of the user-controlled name; 2. add an explicit confinement check after path derivation; - normalize or canonicalize the candidate path, - verify that the result stays under `<common_dir>/modules`, - reject names that contain traversal segments, path separators, or any representation that can escape the modules root. In short, submodule names may remain opaque configuration identifiers, but they should not be treated as trusted filesystem subpaths.

Source published

5 May 2026 19:27:51 UTC

Source modified

10 Sep 2026 03:51:05 UTC

Saved here

24 Oct 2026 13:19:54 UTC

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GitHub Advisory Database · CC-BY-4.0

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Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P

Publisher rating · HIGH