Vulnerability Description
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 186-2.
References
- https://go.dev/cl/781641
- https://go.dev/cl/781661
- https://go.dev/issue/79565
- https://groups.google.com/g/golang-announce/c/a082jnz-LvI
- https://pkg.go.dev/vuln/GO-2026-5018
FAQ
What is CVE-2026-39829?
CVE-2026-39829 is a documented vulnerability. 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...
How severe is CVE-2026-39829?
CVSS scoring is not yet available for CVE-2026-39829. Check NVD for updates.
Is there a patch for CVE-2026-39829?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.