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.
| Container image | Digest | Package | Fixed in | Used by |
|---|---|---|---|---|
| netbirdio/ | 52682e5f48f9 | stdlib | 1.26.9 | 1 |
| netbirdio/ | 8bb1b26f3c8d | stdlib | 1.26.9 | 1 |
| netbirdio/ | b0adc4ad4ec6 | stdlib | 1.26.9 | 1 |
| netbirdio/ | 05b3d8d6d056 | stdlib | 1.26.9 | 1 |
| netbirdio/ | ac6317722f6f | stdlib | 1.26.9 | 1 |
| netbirdio/ | 1aff236dc73f | stdlib | 1.26.9 | 1 |
| netbirdio/ | 872e3add0e1e | stdlib | 1.26.9 | 1 |
| netbirdio/ | a10762533793 | stdlib | 1.26.9 | 1 |
| netbirdio/ | d32f82514a24 | stdlib | 1.26.9 | 1 |
| netbirdio/ | 3104d5ca3a76 | stdlib | 1.26.9 | 1 |
| netbirdio/ | 46ce5a45538f | stdlib | 1.26.9 | 1 |
| netbirdio/ | 67176bcbf6ab | stdlib | 1.26.9 | 1 |
| netbirdio/ | d0fe9d51cdba | stdlib | 1.26.9 | 1 |
| netbirdio/ | e8f392611152 | stdlib | 1.26.9 | 1 |
| netboxcommunity/ | 91b823a05cb5 | stdlib | 1.26.9 | 1 |
| netdata/ | 5cfa05a5fa56 | stdlib | 1.26.9 | 1 |
| nethermind/ | 25f72063f6fc | stdlib | 1.26.9 | 1 |
| netrisai/ | c271efe749d0 | stdlib | 1.26.9 | 1 |
| netrisai/ | 53178bf173c2 | stdlib | 1.26.9 | 1 |
| netrisai/ | 14d82948a8b2 | stdlib | 1.26.9 | 1 |
| netrisai/ | a030a31289f4 | stdlib | 1.26.9 | 1 |
| netrisai/ | 0aa742a0b906 | stdlib | 1.26.9 | 1 |
| netrisai/ | 95abfb776bb4 | stdlib | 1.26.9 | 1 |
| netrisai/ | 44f60aa0d898 | stdlib | 1.26.9 | 1 |
| netskopeprivateaccess/ | 0b43204c37d6 | stdlib | 1.26.9 | 1 |
| neuvector/ | 824e29cf32c5 | stdlib | 1.26.9 | 1 |
| neuvector/ | 72e1deee40fb | stdlib | 1.26.9 | 1 |
| neuvector/ | ab4e4332053a | stdlib | 1.26.9 | 1 |
| newrelic/ | 1a448492b55a | stdlib | 1.26.9 | 1 |
| newrelic/ | 6e43ea951792 | stdlib | 1.26.9 | 1 |
| nextcloud/ | 0e32abf8b219 | stdlib | 1.26.9 | 1 |
| nginx/ | eb5b4fd73325 | stdlib | 1.26.9 | 1 |
| nginx/ | 85666e7fde7e | stdlib | 1.26.9 | 1 |
| ngosang/ | a8f9cfa30162 | stdlib | 1.26.9 | 1 |
| ngrok/ | 01811a267e05 | stdlib | 1.26.9 | 1 |
| nineinfra/ | debb1e3410e2 | stdlib | 1.26.9 | 1 |
| nineinfra/ | 8d8ed87ef77c | stdlib | 1.26.9 | 1 |
| nineinfra/ | 11259032fb04 | stdlib | 1.26.9 | 1 |
| nineinfra/ | d4aad414eccd | stdlib | 1.26.9 | 1 |
| nineinfra/ | af6eb2f37bfc | stdlib | 1.26.9 | 1 |
| nmalhotr/ | 3419361fb0dd | stdlib | 1.26.9 | 1 |
| nocodb/ | 6779a4ddedf2 | stdlib | 1.26.9 | 1 |
| nocodb/ | b0b91ec2a2dd | stdlib | 1.26.9 | 1 |
| nocodb/ | d9516f0bf546 | stdlib | 1.26.9 | 1 |
| nocodb/ | f9b799933aa8 | stdlib | 1.26.9 | 1 |
| noooste/ | e4a33c448304 | stdlib | 1.26.9 | 1 |
| nousresearch/ | e0df6adebddf | stdlib | 1.26.9 | 1 |
| novosga/ | 9957d44343db | stdlib | 1.26.9 | 1 |
| nsqio/ | 1a369c146af7 | stdlib | 1.26.9 | 1 |
| ntakashi/ | f7b68bee2a68 | stdlib | 1.26.9 | 1 |