CVE-2026-78663
Go standard library net/http
- Go standard library net/http
- Critical
- CVSS 9.1
- EPSS 0.62%
- Fixed version listed
What to do
Fixed version listed
Affected products
| Product | Affected | Fixed in |
|---|---|---|
| Go standard library net/http | before 1.26.9 | 1.26.9 |
| Go standard library net/http/internal/http2 | from 1.27.0-0, before 1.27.2 | 1.27.2 |
| golang.org/x/net golang.org/x/net/http2 | before 0.60.0 | 0.60.0 |
Scores and signals
- Exploitation
- No known exploitation
- Severity
- Critical, CVSS 9.1 (v3.1, scored by CISA-ADP)
- EPSS
- 0.62% chance of exploitation in the next 30 days (EPSS from FIRST, as of Oct 25, 2026)
- CISA's SSVC decision points
- Exploitation: none. Automatable: yes. Technical impact: total. As of Oct 9, 2026.
- Weakness
- CWE-675: Multiple Operations on Resource in Single-Operation Context
- Vendor
- Go standard library, net/http
Timeline
- First listed as critical by cve.now. Affected and fixed versions come from the CVE record, once one is published.