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CVE-2026-39832

Medium

Elevated severity or exploit probability.

CVSS base
9.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS — probability of exploitation (30 days)
0.7%
51.7th percentile
CISA KEV
Not listed
Weakness / dates
CWE-281
Published 2026-05-22 · modified 2026-09-15

Description

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 the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.

Affected

golang

References

Official: NVD · CVE.org