CVSS 3.1
9.1 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:NCVE-2026-39832
Critical (9.1) in golang crypto. EPSS 0.7% chance of exploitation in the next 30 days. Fixed in golang.org/x/crypto 0.52.0.
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.
Severity
- EPSS
- 0.7% chance of exploitation in the next 30 days; higher than 52% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-502, CWE-281
- Published
- Modified
- Record from
- the NVD, synced
Affected
- golang:crypto
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-f5wc-c3c7-36mc | Go | golang.org/x/crypto | <0.52.0 | 0.52.0 |
| GO-2026-5006 | Go | golang.org/x/crypto | <0.52.0 | 0.52.0 |