CVSS 3.1
9.1 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HCVE-2026-39830
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.
A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded.
Severity
- EPSS
- 0.7% chance of exploitation in the next 30 days; higher than 52% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-119, CWE-772
- Published
- Modified
- Record from
- the NVD, synced
Affected
- golang:crypto
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-vgwf-h737-ff37 | Go | golang.org/x/crypto | <0.52.0 | 0.52.0 |
| GO-2026-5017 | Go | golang.org/x/crypto | <0.52.0 | 0.52.0 |