CVE-2026-56866
HighAdvisory
Published 8 Oct 2026In the index since 9 Oct 2026
- Severity
- High
- worst across findings
- CVSS
- 7.5
- base score, highest
- EPSS
- 0.003
- 22nd percentile
- CISA KEV
- Not listed
- no confirmed exploitation
- Charts affected
- 5,264
- of 18,143 indexed, latest versions
- Container images
- 6,101
- deployed by those charts
- Fix available
- 1 of 2
- affected packages
HTTP/1 client connection desynchronization after CONNECT rejection in net/http
Carried by container images the latest versions of 5,264 of 18,143 indexed charts deploy, on 6,101 images.
| Affected package | Affected versions | Fixed in | Images |
|---|---|---|---|
| stdlibgolang | go1.13, go1.13.1, go1.13.3, go1.13.4+208 more | 1.26.9 | 6,101 |
| golang-1.19deb | 1.19.8-2 | no fix listed | 1 |
- OSV records
- DEBIAN-CVE-2026-56866GO-2026-6605
- Also known as
- BIT-golang-2026-56866
- Trending
- Rank 14 in indexed charts, since 9 Oct 2026. See the ranking →
Charts affected
5,264 by stars
| Chart | Latest | Affected images | Radar Score |
|---|
Container images carrying it
6,101 by charts deploying them
A fixed version is listed for 1 of the 2 affected packages.