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 |
|---|---|---|---|---|
| mesosphere/ | c10011f866f2 | stdlib | 1.26.9 | 1 |
| mesosphere/ | 4fd8889195fe | stdlib | 1.26.9 | 1 |
| mesosphere/ | 5456581d7b76 | stdlib | 1.26.9 | 1 |
| metacontrollerio/ | 0336993b88e4 | stdlib | 1.26.9 | 1 |
| metacontrollerio/ | 897c9601d2cc | stdlib | 1.26.9 | 1 |
| metacubex/ | e1d7dadaa936 | stdlib | 1.26.9 | 1 |
| metalmatze/ | 426bc2ca7586 | stdlib | 1.26.9 | 1 |
| metalmatze/ | 90d6acb6d47d | stdlib | 1.26.9 | 1 |
| meyay/ | a682153ae53b | stdlib | 1.26.9 | 1 |
| microslac/ | a90091a1f524 | stdlib | 1.26.9 | 1 |
| middlewareeng/ | 747d880812f1 | stdlib | 1.26.9 | 1 |
| mikefarah/ | 2c100efaca06 | stdlib | 1.26.9 | 1 |
| mikejoh/ | 5c5a3b734271 | stdlib | 1.26.9 | 1 |
| mikejoh/ | 78737d7345f9 | stdlib | 1.26.9 | 1 |
| milvusdb/ | 102aac62827b | stdlib | 1.26.9 | 1 |
| milvusdb/ | fededb2f2d63 | stdlib | 1.26.9 | 1 |
| milvusdb/ | 08747249b27c | stdlib | 1.26.9 | 1 |
| milvusdb/ | a3a55e1c1497 | stdlib | 1.26.9 | 1 |
| milvusdb/ | 2212dfb61401 | stdlib | 1.26.9 | 1 |
| milvusdb/ | 9459806dd11f | stdlib | 1.26.9 | 1 |
| mindsdb/ | 163011c09299 | stdlib | 1.26.9 | 1 |
| miniflux/ | 49d7b6098761 | stdlib | 1.26.9 | 1 |
| miniflux/ | a3ca6bbc1f74 | stdlib | 1.26.9 | 1 |
| miniflux/ | e2fb990dae74 | stdlib | 1.26.9 | 1 |
| minio/ | 170b154d2c61 | stdlib | 1.26.9 | 1 |
| minio/ | 2adc5be088f5 | stdlib | 1.26.9 | 1 |
| mintel/ | 0e0707b7732b | stdlib | 1.26.9 | 1 |
| mirrorgitlabcontainers/ | 83599461ef8b | stdlib | 1.26.9 | 1 |
| mirrorgitlabcontainers/ | 06b19a4bc805 | stdlib | 1.26.9 | 1 |
| mirrorgitlabcontainers/ | 9f3654f1eafc | stdlib | 1.26.9 | 1 |
| mirrorgitlabcontainers/ | a6d7bf42805a | stdlib | 1.26.9 | 1 |
| mirrorgitlabcontainers/ | 99931bd06b41 | stdlib | 1.26.9 | 1 |
| misalbasynchrotron/ | 48e4dcba8f6e | stdlib | 1.26.9 | 1 |
| missuo/ | 32e492587678 | stdlib | 1.26.9 | 1 |
| mitre/ | 2bc4dfb8150f | stdlib | 1.26.9 | 1 |
| moby/ | 80b15f0735e8 | stdlib | 1.26.9 | 1 |
| moby/ | a095b3d11ce1 | stdlib | 1.26.9 | 1 |
| moby/ | b059f8d7226d | stdlib | 1.26.9 | 1 |
| moby/ | c2aeafaed434 | stdlib | 1.26.9 | 1 |
| moby/ | e7c131019aa9 | stdlib | 1.26.9 | 1 |
| moby/ | f3864381e463 | stdlib | 1.26.9 | 1 |
| mohankrishna999/ | 7f980f8c650c | stdlib | 1.26.9 | 1 |
| moikot/ | 0d941bd30ffa | stdlib | 1.26.9 | 1 |
| moikot/ | 8625f53aa9b7 | stdlib | 1.26.9 | 1 |
| moikot/ | fb8565140106 | stdlib | 1.26.9 | 1 |
| mongodb/ | cfe202a2a076 | stdlib | 1.26.9 | 1 |
| mongodb/ | 3a8affee01fd | stdlib | 1.26.9 | 1 |
| monitoror/ | 4b88edcf51ff | stdlib | 1.26.9 | 1 |
| moonrailgun/ | b528c8f8fcc4 | stdlib | 1.26.9 | 1 |
| moul/ | 332b603727c3 | stdlib | 1.26.9 | 1 |