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
- 5,263
- of 18,131 indexed, latest versions
- Container images
- 6,077
- 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 5,263 of 18,131 indexed charts deploy, on 6,077 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 | 6,077 |
| 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
5,263 by stars
Container images carrying it
6,077 by charts deploying them
A fixed version is listed for 1 of the 2 affected packages.
| Container image | Digest | Package | Fixed in | Used by |
|---|---|---|---|---|
| thecodingmachine/ | 519c31c6e7ec | stdlib | 1.26.9 | 1 |
| thecodingmachine/ | 5bdab56da2fa | stdlib | 1.26.9 | 1 |
| thecodingmachine/ | d8f66979b9b4 | stdlib | 1.26.9 | 1 |
| thecodingmachine/ | df31006cc4ce | stdlib | 1.26.9 | 1 |
| thecodingmachine/ | 3ccd467543b3 | stdlib | 1.26.9 | 1 |
| thecodingmachine/ | 962e98843fb2 | stdlib | 1.26.9 | 1 |
| thelande/ | 7e9072ace15f | stdlib | 1.26.9 | 1 |
| thelisdeep/ | 6a8b0c89227b | stdlib | 1.26.9 | 1 |
| thesisrobot/ | 287129953689 | stdlib | 1.26.9 | 1 |
| thesisrobot/ | d94c8dbf6dac | stdlib | 1.26.9 | 1 |
| thetorproject/ | 1ddc5069d354 | stdlib | 1.26.9 | 1 |
| thev1ndu/ | a07203713933 | stdlib | 1.26.9 | 1 |
| thijsvanloef/ | 401d3eb5c053 | stdlib | 1.26.9 | 1 |
| thijsvanloef/ | b4ac9ee22483 | stdlib | 1.26.9 | 1 |
| thingsboard/ | 0f6c14031777 | stdlib | 1.26.9 | 1 |
| thomseddon/ | 69a2c985d2c5 | stdlib | 1.26.9 | 1 |
| thomseddon/ | b364aa6a4117 | stdlib | 1.26.9 | 1 |
| tile38/ | 5b61c6f3b32e | stdlib | 1.26.9 | 1 |
| tile38/ | afb7e82f9485 | stdlib | 1.26.9 | 1 |
| timescale/ | 645fd9e92d76 | stdlib | 1.26.9 | 1 |
| timescale/ | 6f139d560429 | stdlib | 1.26.9 | 1 |
| timescale/ | a8e3322e1cf9 | stdlib | 1.26.9 | 1 |
| timescale/ | cdb9ae118899 | stdlib | 1.26.9 | 1 |
| timescale/ | e8d0a9cc3db5 | stdlib | 1.26.9 | 1 |
| timescale/ | e9f34d8dd276 | stdlib | 1.26.9 | 1 |
| timescale/ | ed719c0cd19d | stdlib | 1.26.9 | 1 |
| timescale/ | 7758704d4a14 | stdlib | 1.26.9 | 1 |
| timonwong/ | a0fcc028bd8d | stdlib | 1.26.9 | 1 |
| tinymediamanager/ | 48c15784a127 | stdlib | 1.26.9 | 1 |
| tksky1/ | ec7b889f380f | stdlib | 1.26.9 | 1 |
| tobiasbp/ | 14bee6e33a26 | stdlib | 1.26.9 | 1 |
| tobiasehlert/ | cf09259ad0ea | stdlib | 1.26.9 | 1 |
| tobirachel/ | 7d9f37154994 | stdlib | 1.26.9 | 1 |
| toniblyx/ | 9dbcc3c9abd7 | stdlib | 1.26.9 | 1 |
| toucansoftware/ | c187b1fba501 | stdlib | 1.26.9 | 1 |
| trackerforce/ | 20235fe419e4 | stdlib | 1.26.9 | 1 |
| traefik/ | cf071f3e165c | stdlib | 1.26.9 | 1 |
| traefik/ | 6259bdda7aa6 | stdlib | 1.26.9 | 1 |
| traefik/ | 1474027c3166 | stdlib | 1.26.9 | 1 |
| traefik/ | 1699d99cb4b9 | stdlib | 1.26.9 | 1 |
| traefik/ | 2c52bb2c8480 | stdlib | 1.26.9 | 1 |
| traefik/ | 8d0f943abdbf | stdlib | 1.26.9 | 1 |
| traefik/ | d38496bf0900 | stdlib | 1.26.9 | 1 |
| traggo/ | f1ced637510e | stdlib | 1.26.9 | 1 |
| tranhailong/ | 028662749be2 | stdlib | 1.26.9 | 1 |
| treeverse/ | 556a05af968c | stdlib | 1.26.9 | 1 |
| treeverse/ | 237a17c6b2d8 | stdlib | 1.26.9 | 1 |
| treeverse/ | 478f37a6cffc | stdlib | 1.26.9 | 1 |
| treskon/ | 88e813f22347 | stdlib | 1.26.9 | 1 |
| trinodb/ | 5b5e0a97f599 | stdlib | 1.26.9 | 1 |