CVE-2026-123533 json
Gitoxide before 0.42.0 Denial of Service via Crafted Commit-Graph File
published 20d ago modified yesterday also EUVD-2026-119418 , GHSA-989c-xj77-266r
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository GitoxideLabs/gitoxide. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 5.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 1%
- public exploits
- 0
- none known
Summary
gix-commitgraph before 0.42.0, as used in gitoxide before 0.61.0, contains a denial of service vulnerability because its commit-graph parser does not validate parent graph positions against the declared commit count or check the EDGE chunk length for 4-byte alignment. Attackers can supply a repository containing a crafted .git/objects/info/commit-graph file to trigger panics that abort gix merge-base, gix blame, and applications embedding gix.
Patch / fix
- GitoxideLabs gitoxide 0.42.0, 0.61.0
Is CVE-2026-123533 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- yesterday
Exploit prediction
0.11% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.8 | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| CNA | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
| CNA | 4.0 | 6.8 | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/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 |
Inferred packages
No advisory lists a package for this vulnerability yet. The CVE names these as products and links their GitHub repository, and the package registry names the same repository, so they are probably the affected packages. Low confidence: the versions are the CVE’s own for the product, and a stack check reports the package as unchecked when there are none.
| ecosystem | package | repository | affected |
|---|---|---|---|
| pypi | gitoxide | gitoxidelabs/gitoxide | < 0.42.0 < 0.61.0 |
Affected products
- GitoxideLabs gitoxide
Classification
- Weakness
-
- CWE-248 Uncaught Exception
References
-
github.com
/GitoxideLabs/gitoxide/security/advisories/GHSA-989c-xj77-266r
vendor-advisory, advisory
-
vulncheck.com
/advisories/gitoxide-before-0.42.0-denial-of-service-via-crafted-commit-graph-file
third-party-advisory
Sources
- CVE List CVE-2026-123533
- NVD CVE-2026-123533
- Maintainer advisory GHSA-989c-xj77-266r
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of GitoxideLabs/gitoxide published their own advisory on GitHub. Reviewed sources take precedence over it.