CVE-2026-102289
zizmor: Debug logging prints available GitHub credentials in cleartext
zizmor is a static analysis tool for CI/CD systems. In version 1.27.0, debug logging serializes the parsed application configuration with a derived Debug implementation for GitHubToken, causing credentials supplied through GH_TOKEN, GITHUB_TOKEN, ZIZMOR_GITHUB_TOKEN, --gh-token, --github-token, or --zizmor-github-token to be written to stderr in cleartext. A single -v or --verbose option or an applicable RUST_LOG directive enables the affected logging during normal online operation and --no-online-audits, while explicit --offline clears the token first. If another party can read a CI log, support artifact, terminal capture, or public bug report containing the output, the party can use the credential according to its scopes, repository access, and lifetime. This vulnerability is fixed in 1.28.0.
Fixes and workarounds
Fix
zizmor (PyPI): OSV reports a fixed version 1.28.0. Check the advisory for supported release branches.
Source: OSV GHSA-f42p-wjw5-97qhAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| zizmor zizmorcore |
= 1.27.0 (affected) | CNA: GitHub_M |
zizmorzizmor
PyPI |
1.27.0 (affected, PyPI) Ecosystem version events: introduced 1.27.0; fixed 1.28.0 Source events (ECOSYSTEM)Other versions: unaffected |
OSV GHSA-f42p-wjw5-97qh |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 7.0 high |
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H | CNA: GitHub_M |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/zizmorcore/zizmor/security/advisories/GHSA-f42p-wjw5-97qhCNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/zizmorcore/zizmor/pull/2213CNA: GitHub_M · x_refsource_MISC
- https://github.com/zizmorcore/zizmor/pull/2215CNA: GitHub_M · x_refsource_MISC
- https://github.com/zizmorcore/zizmor/commit/0731e01706af273be860d3d221e4d122e6741b6fCNA: GitHub_M · x_refsource_MISC
- https://github.com/zizmorcore/zizmor/commit/724d0e86f4c073c3dc64507fb6c39bc20e46a48fCNA: GitHub_M · x_refsource_MISC
- https://github.com/zizmorcore/zizmor/releases/tag/v1.28.0CNA: GitHub_M · x_refsource_MISC
- https://github.com/advisories/GHSA-f42p-wjw5-97qhOSV / GitHub Security Advisories · advisory
- https://osv.dev/vulnerability/GHSA-f42p-wjw5-97qhOSV / GitHub Security Advisories · osv
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