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Vulnerabilities

Vulnerability · CVE-2026-24122

Cosign provides code signing and transparency for containers and binaries.

Published Feb 19, 2026 · catalog updated Feb 20, 2026 · Cosign provides code signing

Last checked Nov 12, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-24122. EPSS is 0.21%. Act only if a listed version of Cosign provides code signing is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Cosign provides code signing).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Low3.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.21%
Remediation
Version ranges on file
Affected products
vendor sigstore cosign < 3.0.5

Cosign provides code signing and transparency for containers and binaries. In versions 3.0.4 and below, an issuing certificate with a validity that expires before the leaf certificate will be considered valid during verification even if the provided timestamp would mean the issuing certificate should be considered expired. When verifying artifact signatures using a certificate, Cosign first verifies the certificate chain using the leaf certificate's "not before" timestamp and later checks expiry of the leaf certificate using either a signed timestamp provided by the Rekor transparency log or f

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor sigstore cosign < 3.0.5< 3.0.5

How to fix CVE-2026-24122

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-24122. EPSS is 0.21%. Act only if a listed version of Cosign provides code signing is installed.

Which versions are affected?

Compare what you have installed with sigstore cosign < 3.0.5 < 3.0.5. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.21%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 19, 2026 · EUVD

    Detected

    Cosign provides code signing and transparency for containers and binaries. In versions 3.0.4 and below, an issuing certificate with a validity that expires before the leaf certificate will be considered valid during verification even if the provided timestamp would mean the issuing certificate should be considered expired. When verifying artifact signatures using a certificate, Cosign first verifi

  2. Feb 20, 2026 · EUVD

    Updated

    Cosign provides code signing and transparency for containers and binaries. In versions 3.0.4 and below, an issuing certificate with a validity that expires before the leaf certificate will be considered valid during verification even if the provided timestamp would mean the issuing certificate should be considered expired. When verifying artifact signatures using a certificate, Cosign first verifi

Sources

  • CVE.orgVulnerability recordCVE-2026-24122

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-24122

    30-day exploitation probability 0.21%

    first.org
  • EUVDVulnerability recordEUVD-2026-8430

    Cosign provides code signing and transparency for containers and binaries. In versions 3.0.4 and below, an issuing certificate with a validity that expires before the leaf certificate will be considered valid during verification even if the provided timestamp would mean the issui

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 12, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 9, 2026
  • CVE.orgNov 9, 2026
  • EUVDNov 9, 2026