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 |
|---|---|---|---|---|
| library/ | 8812029260b5 | stdlib | 1.26.9 | 1 |
| library/ | 983c696655e8 | stdlib | 1.26.9 | 1 |
| library/ | a10d46445d68 | stdlib | 1.26.9 | 1 |
| library/ | b0f9fc41ed79 | stdlib | 1.26.9 | 1 |
| library/ | ba10ac9ba17a | stdlib | 1.26.9 | 1 |
| library/ | cdd3dbdea45c | stdlib | 1.26.9 | 1 |
| library/ | d7f5dd5f70e2 | stdlib | 1.26.9 | 1 |
| library/ | 7232f6388a4d | stdlib | 1.26.9 | 1 |
| library/ | 17a4f64e9cf5 | stdlib | 1.26.9 | 1 |
| library/ | 33eae14f0867 | stdlib | 1.26.9 | 1 |
| library/ | 07e06f2e7ae9 | stdlib | 1.26.9 | 1 |
| library/ | 1c33370a599c | stdlib | 1.26.9 | 1 |
| library/ | 22edfe1c7834 | stdlib | 1.26.9 | 1 |
| library/ | 490f01279be1 | stdlib | 1.26.9 | 1 |
| library/ | 5b6a1eac15b8 | stdlib | 1.26.9 | 1 |
| library/ | 628f228f0fd5 | stdlib | 1.26.9 | 1 |
| library/ | 6422478cb8e1 | stdlib | 1.26.9 | 1 |
| library/ | 6b848cb24fbb | stdlib | 1.26.9 | 1 |
| library/ | 8a16204dc96c | stdlib | 1.26.9 | 1 |
| library/ | 9a48ac9f196f | stdlib | 1.26.9 | 1 |
| library/ | a02fe89cb597 | stdlib | 1.26.9 | 1 |
| library/ | b1cb255a9939 | stdlib | 1.26.9 | 1 |
| library/ | bfc25a68e113 | stdlib | 1.26.9 | 1 |
| library/ | dd9b303aed4f | stdlib | 1.26.9 | 1 |
| library/ | e22328f4d714 | stdlib | 1.26.9 | 1 |
| library/ | fbb8456ebdb1 | stdlib | 1.26.9 | 1 |
| library/ | fcc7fcd7114a | stdlib | 1.26.9 | 1 |
| library/ | 0032d2ca20db | stdlib | 1.26.9 | 1 |
| library/ | 05678ae4e5e1 | stdlib | 1.26.9 | 1 |
| library/ | 3b6c281e1c08 | stdlib | 1.26.9 | 1 |
| library/ | 3d0e6df9fd5b | stdlib | 1.26.9 | 1 |
| library/ | 50cae5081ab4 | stdlib | 1.26.9 | 1 |
| library/ | 5d7043a4ffe0 | stdlib | 1.26.9 | 1 |
| library/ | 61dd87ff554d | stdlib | 1.26.9 | 1 |
| library/ | 6200825c6ed5 | stdlib | 1.26.9 | 1 |
| library/ | 646902910d6a | stdlib | 1.26.9 | 1 |
| library/ | 699d652ed674 | stdlib | 1.26.9 | 1 |
| library/ | 71a63fc2438e | stdlib | 1.26.9 | 1 |
| library/ | 7c81758cb295 | stdlib | 1.26.9 | 1 |
| library/ | 88785f6f665a | stdlib | 1.26.9 | 1 |
| library/ | ae1cf99fa7bf | stdlib | 1.26.9 | 1 |
| library/ | d0d926f94df0 | stdlib | 1.26.9 | 1 |
| library/ | d23ec07162ca | stdlib | 1.26.9 | 1 |
| library/ | dca8d11fe467 | stdlib | 1.26.9 | 1 |
| library/ | e0ce8c35124d | stdlib | 1.26.9 | 1 |
| library/ | f71f6d0913c9 | stdlib | 1.26.9 | 1 |
| library/ | 106d5197fd8e | stdlib | 1.26.9 | 1 |
| library/ | 3c1aab708f6e | stdlib | 1.26.9 | 1 |
| library/ | 85b9bf2e29cf | stdlib | 1.26.9 | 1 |
| library/ | 8dbcf531a03a | stdlib | 1.26.9 | 1 |