What is CVE-2026-39832?

CVE-2026-39832 is a critical-severity vulnerability in Golang Crypto, classified under Deserialization of Untrusted Data. CVSS score: 9.1/10. Published 2026-05-22.

How severe is CVE-2026-39832?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Deserialization in Golang Crypto

CVE-2026-39832

When adding a key to a remote agent constraint extensions such as restrict-destination-v00@openssh.com were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of t…

Vulnerability class: Insecure Deserialization

EPSS: 0.001 (21.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

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

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

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

Frequently asked questions

What is CVE-2026-39832?: CVE-2026-39832 is a critical-severity vulnerability in Golang Crypto, classified under Deserialization of Untrusted Data. CVSS score: 9.1/10. Published 2026-05-22.
How severe is CVE-2026-39832?: Critical severity. CVSS v3 base score is 9.1 out of 10.