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
| Chart | Latest | Affected images | Radar Score |
|---|
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 |
|---|---|---|---|---|
| layer5/ | 77d59943b3d6 | stdlib | 1.26.9 | 1 |
| layer5/ | 25a4cc38abcd | stdlib | 1.26.9 | 1 |
| layer5/ | 8c20a8a1d6a4 | stdlib | 1.26.9 | 1 |
| layer5/ | fde47c141ec6 | stdlib | 1.26.9 | 1 |
| layer5/ | 9d25f029a8a2 | stdlib | 1.26.9 | 1 |
| layer5/ | b99c73bac1f5 | stdlib | 1.26.9 | 1 |
| layer5/ | b3864dfd47ad | stdlib | 1.26.9 | 1 |
| layer5/ | ebd6a8faf21f | stdlib | 1.26.9 | 1 |
| layer5/ | 6f58a28fe422 | stdlib | 1.26.9 | 1 |
| layer5/ | ec898e5786c6 | stdlib | 1.26.9 | 1 |
| layer5/ | 797fa7a03570 | stdlib | 1.26.9 | 1 |
| lbenicio/ | 51d3d30206c8 | stdlib | 1.26.9 | 1 |
| lbenicio/ | 35eb784c03fa | stdlib | 1.26.9 | 1 |
| lbenicio/ | 9202e96ad403 | stdlib | 1.26.9 | 1 |
| lbenicio/ | 2797937bc2a5 | stdlib | 1.26.9 | 1 |
| leonardomulticloud/ | e4acd2fbb7b1 | stdlib | 1.26.9 | 1 |
| leonardomulticloud/ | d119918900e8 | stdlib | 1.26.9 | 1 |
| library/ | 4c6e91c6ed0e | stdlib | 1.26.9 | 1 |
| library/ | 60fb54d36b4b | stdlib | 1.26.9 | 1 |
| library/ | 7367adca165f | stdlib | 1.26.9 | 1 |
| library/ | 834468128c76 | stdlib | 1.26.9 | 1 |
| library/ | 874405536b3e | stdlib | 1.26.9 | 1 |
| library/ | b4e3952384eb | stdlib | 1.26.9 | 1 |
| library/ | d44355d3c214 | stdlib | 1.26.9 | 1 |
| library/ | d76116d819d5 | stdlib | 1.26.9 | 1 |
| library/ | fbc51bcf1ab0 | stdlib | 1.26.9 | 1 |
| library/ | 0909b1681015 | stdlib | 1.26.9 | 1 |
| library/ | 96d8a3f65a4f | stdlib | 1.26.9 | 1 |
| library/ | 1ba18449911d | stdlib | 1.26.9 | 1 |
| library/ | 1d148deae16a | stdlib | 1.26.9 | 1 |
| library/ | 2416984b43dd | stdlib | 1.26.9 | 1 |
| library/ | 2a232a42256f | stdlib | 1.26.9 | 1 |
| library/ | 3153fa63f546 | stdlib | 1.26.9 | 1 |
| library/ | 3f3c01aaaebf | stdlib | 1.26.9 | 1 |
| library/ | 54155db4950e | stdlib | 1.26.9 | 1 |
| library/ | 7dcdfc4a2024 | stdlib | 1.26.9 | 1 |
| library/ | 851f91d24121 | stdlib | 1.26.9 | 1 |
| library/ | a56b3bdde893 | stdlib | 1.26.9 | 1 |
| library/ | aa3df78ecf32 | stdlib | 1.26.9 | 1 |
| library/ | afa5d5134900 | stdlib | 1.26.9 | 1 |
| library/ | d9a0fd8bdd15 | stdlib | 1.26.9 | 1 |
| library/ | dd43b430341a | stdlib | 1.26.9 | 1 |
| library/ | 1ef2e532ca4d | stdlib | 1.26.9 | 1 |
| library/ | 2654b1e90413 | stdlib | 1.26.9 | 1 |
| library/ | 29773d6be407 | stdlib | 1.26.9 | 1 |
| library/ | 77196da4b0df | stdlib | 1.26.9 | 1 |
| library/ | 83f7bf209844 | stdlib | 1.26.9 | 1 |
| library/ | 90592b712b6b | stdlib | 1.26.9 | 1 |
| library/ | db4c56c196d6 | stdlib | 1.26.9 | 1 |
| library/ | e0174e51e812 | stdlib | 1.26.9 | 1 |