What is CVE-2026-39829?

CVE-2026-39829 is a high-severity vulnerability in Golang Crypto, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2026-05-22.

How severe is CVE-2026-39829?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Golang Crypto

CVE-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 co…

EPSS: 0.000 (10.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Golang Crypto
Golang.org/x/crypto Golang.org/x/crypto/ssh — versions 0

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

security@golang.org (Issue Tracking)
security@golang.org (Mailing List)
security@golang.org (Issue Tracking)
security@golang.org (Issue Tracking)
security@golang.org (Vendor Advisory)

Frequently asked questions

What is CVE-2026-39829?: CVE-2026-39829 is a high-severity vulnerability in Golang Crypto, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2026-05-22.
How severe is CVE-2026-39829?: High severity. CVSS v3 base score is 7.5 out of 10.