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
- 5,293
- of 18,131 indexed, latest versions
- Container images
- 6,123
- 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 5,293 of 18,131 indexed charts deploy, on 6,123 images.
| Affected package | Affected versions | Fixed in | Images |
|---|---|---|---|
| stdlibgolang | go1.13, go1.13.1, go1.13.3, go1.13.4+209 more | 1.26.9 | 6,123 |
| golang-1.19deb | 1.19.8-2 | no fix listed | 1 |
- OSV records
- DEBIAN-CVE-2026-56866GO-2026-6605
- Trending
- Rank 10 in indexed charts, since 9 Oct 2026. See the ranking →
Charts affected
5,293 by stars
| Chart | Latest | Affected images | Radar Score |
|---|
Container images carrying it
6,123 by charts deploying them
A fixed version is listed for 1 of the 2 affected packages.
| Container image | Digest | Package | Fixed in | Used by |
|---|---|---|---|---|
| ghusta/ | 879d0919fdcc | stdlib | 1.26.9 | 1 |
| giantswarm/ | a6cac55aa2d4 | stdlib | 1.26.9 | 1 |
| gidoichi/ | 2dd5322a0610 | stdlib | 1.26.9 | 1 |
| gitea/ | 6120b1165f3a | stdlib | 1.26.9 | 1 |
| gitea/ | 7940221bcfc9 | stdlib | 1.26.9 | 1 |
| gitea/ | 8368754bb612 | stdlib | 1.26.9 | 1 |
| gitea/ | b5c35d6bdbb9 | stdlib | 1.26.9 | 1 |
| gitea/ | c2a169c5e998 | stdlib | 1.26.9 | 1 |
| gitea/ | c57233403eff | stdlib | 1.26.9 | 1 |
| gitea/ | 1c17ecaead42 | stdlib | 1.26.9 | 1 |
| gitea/ | 34e3f6b75f5c | stdlib | 1.26.9 | 1 |
| gitea/ | 76f516a1a8c2 | stdlib | 1.26.9 | 1 |
| gitea/ | 7d13848af126 | stdlib | 1.26.9 | 1 |
| gitea/ | 85416d6f65fe | stdlib | 1.26.9 | 1 |
| gitea/ | ac73e0da341f | stdlib | 1.26.9 | 1 |
| gitea/ | b0bdf102b485 | stdlib | 1.26.9 | 1 |
| gitea/ | d5ab14cd29af | stdlib | 1.26.9 | 1 |
| gitea/ | f505a0d3a413 | stdlib | 1.26.9 | 1 |
| gitlab/ | 860d4a3fec7a | stdlib | 1.26.9 | 1 |
| gitlab/ | fd7e5dfb9f30 | stdlib | 1.26.9 | 1 |
| gkarthics/ | 6799af333e8a | stdlib | 1.26.9 | 1 |
| glanceapp/ | 32ab73d80f2b | stdlib | 1.26.9 | 1 |
| glanceapp/ | 6df86a7e8868 | stdlib | 1.26.9 | 1 |
| glasskube/ | be5133100d63 | stdlib | 1.26.9 | 1 |
| goalert/ | 08d57388b0cb | stdlib | 1.26.9 | 1 |
| gobitfly/ | 1d08a7986348 | stdlib | 1.26.9 | 1 |
| goccx/ | f4b3ebea0303 | stdlib | 1.26.9 | 1 |
| gocrane/ | a1400909118c | stdlib | 1.26.9 | 1 |
| gocrane/ | 9ba6d11b2079 | stdlib | 1.26.9 | 1 |
| gocrane/ | a2d7e60576f9 | stdlib | 1.26.9 | 1 |
| gogost/ | f7a958c45192 | stdlib | 1.26.9 | 1 |
| gogs/ | 0195b095d0b2 | stdlib | 1.26.9 | 1 |
| gogs/ | 420d53bb7277 | stdlib | 1.26.9 | 1 |
| goharbor/ | 6ab3ca28e9e5 | stdlib | 1.26.9 | 1 |
| goharbor/ | 451103a6c8d8 | stdlib | 1.26.9 | 1 |
| goharbor/ | 6412d679fdc3 | stdlib | 1.26.9 | 1 |
| goharbor/ | 7d2ba5304a72 | stdlib | 1.26.9 | 1 |
| goharbor/ | 86bf3031f4a7 | stdlib | 1.26.9 | 1 |
| goharbor/ | a30e5a8be3d9 | stdlib | 1.26.9 | 1 |
| goharbor/ | c017dd84ee96 | stdlib | 1.26.9 | 1 |
| goharbor/ | 39435daedd0c | stdlib | 1.26.9 | 1 |
| goharbor/ | 8d5339ff2d74 | stdlib | 1.26.9 | 1 |
| goharbor/ | e2b0298e894d | stdlib | 1.26.9 | 1 |
| goharbor/ | f143578ef30e | stdlib | 1.26.9 | 1 |
| goharbor/ | 30bd1ace4e3b | stdlib | 1.26.9 | 1 |
| goharbor/ | 7f82ed1e2635 | stdlib | 1.26.9 | 1 |
| goharbor/ | cce272836449 | stdlib | 1.26.9 | 1 |
| goharbor/ | ddf6bb429eb6 | stdlib | 1.26.9 | 1 |
| goharbor/ | fd91a4a1273f | stdlib | 1.26.9 | 1 |
| goharbor/ | a92b51aa7d6e | stdlib | 1.26.9 | 1 |