Bug 2571173 (CVE-2026-102289)

Summary: CVE-2026-102289 zizmor: zizmor: Cleartext credential exposure via debug logging
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in zizmor. When verbose or debug logging is enabled, the parsed application configuration is serialized without masking sensitive authentication tokens. This issue causes credentials supplied through command-line options or environment variables to be written in cleartext to standard error (stderr). An unauthorized user with read access to terminal outputs, continuous integration (CI) logs, or error reports can retrieve these credentials and access associated repositories or resources.
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Description OSIDB Bzimport 2026-11-10 20:44:01 UTC 
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.