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VulnerabilityPublished

CVE-2026-102289: zizmor · Debug logging prints available GitHub credentials in cleartext

Affects zizmorSource GCVE Database

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Authoritative record:CVE-2026-102289· High 7.0

Not known to be exploited · CVSS 7.0 High : upgrade to 1.28.0 soon.

Data as of 9 Nov 2026, 23:21 UTC

CVSS 4.0 base score
7.0High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (GitHub_M)CVSS 4.07.0
Patch
Available – fixed in 1.28.0
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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 9 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.

What to do

Upgrade zizmor to 1.28.0.

Affected software

ProductAffectedFixed in
PyPIzizmorAffected
  • >=1.27.0 <1.28.0
  • =1.27.0
Fixed in
  • 1.28.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available in version 1.28.0; users should upgrade to this version to prevent token exposure in debug logs. Until upgrading, avoid enabling debug-level logging when supplying GitHub tokens to zizmor. Additionally, users should be cautious about sharing logs generated with debug verbosity to avoid accidental credential disclosure.

Description

zizmor version 1.27.0 logs GitHub access tokens in cleartext to stderr when debug-level logging is enabled, exposing sensitive credentials. This occurs because debug logging prints the fully parsed application configuration, including tokens supplied via environment variables or command-line options. The vulnerability is fixed in version 1.28.0.

References

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