The RSA and DSA public key parsers did not enforce size limits on key parameters.

Code

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Timeline

Detection, updates, and resolution for this record.

1. May 22, 2026 · NIST NVD

   Detected

   The RSA and DSA public key parsers did not enforce size limits on key parameters. A crafted public key with an excessively large modulus or DSA parameter could cause several minutes of CPU consumption during signature verification. This could be triggered by unauthenticated clients during public key authentication. RSA moduli are now limited to 8192 bits, and DSA parameters are validated per FIPS

2. Sep 16, 2026 · NIST NVD

   Updated

   The RSA and DSA public key parsers did not enforce size limits on key parameters. A crafted public key with an excessively large modulus or DSA parameter could cause several minutes of CPU consumption during signature verification. This could be triggered by unauthenticated clients during public key authentication. RSA moduli are now limited to 8192 bits, and DSA parameters are validated per FIPS

Affected

• cpe golang/cryptoversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2026-39829

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2026-39829

  The RSA and DSA public key parsers did not enforce size limits on key parameters. A crafted public key with an excessively large modulus or DSA parameter could cause several minutes of CPU consumption during signature verification. This could be triggered by unauthenticated clien

  nvd.nist.gov

References

• Reference · access.redhat.com
• Reference · access.redhat.com
• Reference · access.redhat.com
• Issue Tracking · go.dev
• Issue Tracking · go.dev
• Issue Tracking · go.dev
• Mailing List · groups.google.com
• Vendor Advisory · pkg.go.dev