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
- 5,231
- of 18,108 indexed, latest versions
- Container images
- 6,040
- 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 5,231 of 18,108 indexed charts deploy, on 6,040 images.
| Affected package | Affected versions | Fixed in | Images |
|---|---|---|---|
| stdlibgolang | go1.13, go1.13.1, go1.13.3, go1.13.4+212 more | 1.26.9 | 6,040 |
| golang-1.19deb | 1.19.8-2 | no fix listed | 1 |
- OSV records
- DEBIAN-CVE-2026-56866GO-2026-6605
- Trending
- Rank 8 in indexed charts, since 9 Oct 2026. See the ranking →
Charts affected
5,231 by stars
Container images carrying it
6,040 by charts deploying them
A fixed version is listed for 1 of the 2 affected packages.
| Container image | Digest | Package | Fixed in | Used by |
|---|---|---|---|---|
| assistiot/ | c3adbab6a3e7 | stdlib | 1.26.9 | 1 |
| assistiot/ | 0aacefac9677 | stdlib | 1.26.9 | 1 |
| assistiot/ | 6a107f224c34 | stdlib | 1.26.9 | 1 |
| assistiot/ | eb7f5d765ab6 | stdlib | 1.26.9 | 1 |
| assistiot/ | 33e02dad168f | stdlib | 1.26.9 | 1 |
| assistiot/ | 4bc3d92788ed | stdlib | 1.26.9 | 1 |
| assistiot/ | d157fbe150e3 | stdlib | 1.26.9 | 1 |
| assistiot/ | 0d3e6d35f168 | stdlib | 1.26.9 | 1 |
| assistiot/ | 790dbb198e86 | stdlib | 1.26.9 | 1 |
| assistiot/ | 30812ba93555 | stdlib | 1.26.9 | 1 |
| assistiot/ | 9bb46ea14e8e | stdlib | 1.26.9 | 1 |
| astarte/ | e3ff1b3c0c98 | stdlib | 1.26.9 | 1 |
| atlassian/ | eb98d6fbeee7 | stdlib | 1.26.9 | 1 |
| atlassian/ | a8d7b10b667a | stdlib | 1.26.9 | 1 |
| authelia/ | bd97cff4fcbf | stdlib | 1.26.9 | 1 |
| authzed/ | aa96009a0477 | stdlib | 1.26.9 | 1 |
| automatischio/ | 3bace7a12d5f | stdlib | 1.26.9 | 1 |
| avaprotocol/ | c430ea5c37d6 | stdlib | 1.26.9 | 1 |
| aveshasystems/ | 53fc6d009e04 | stdlib | 1.26.9 | 1 |
| axllent/ | 98b916bd3c8d | stdlib | 1.26.9 | 1 |
| axllent/ | c96991d9bef7 | stdlib | 1.26.9 | 1 |
| ayushsobti/ | fc181870c60f | stdlib | 1.26.9 | 1 |
| b3log/ | 95c0d129bc19 | stdlib | 1.26.9 | 1 |
| b3log/ | d740a1d3ed6b | stdlib | 1.26.9 | 1 |
| basa/ | 34cadcaa29c4 | stdlib | 1.26.9 | 1 |
| baserow/ | af9aa6fe8482 | stdlib | 1.26.9 | 1 |
| baserow/ | e0b3c8130b91 | stdlib | 1.26.9 | 1 |
| baserow/ | df0c42eb67e8 | stdlib | 1.26.9 | 1 |
| bbernhard/ | 2cf09d66a86f | stdlib | 1.26.9 | 1 |
| bbernhard/ | 549ad08d7e14 | stdlib | 1.26.9 | 1 |
| beanbag/ | 6b840f546e1c | stdlib | 1.26.9 | 1 |
| bedag/ | 447a88598f4c | stdlib | 1.26.9 | 1 |
| beopenit/ | d24c323fe7c3 | stdlib | 1.26.9 | 1 |
| beopenit/ | d3999cb8d026 | stdlib | 1.26.9 | 1 |
| beopenit/ | b4d9f9bee224 | stdlib | 1.26.9 | 1 |
| beopenit/ | 75a48144e682 | stdlib | 1.26.9 | 1 |
| berkeleyskypilot/ | a8362d205365 | stdlib | 1.26.9 | 1 |
| berkeleyskypilot/ | 8da2f3cda472 | stdlib | 1.26.9 | 1 |
| betterdb/ | 97dcd2d2192f | stdlib | 1.26.9 | 1 |
| bicarus/ | b1dab0721e1c | stdlib | 1.26.9 | 1 |
| bicarus/ | bed688d16762 | stdlib | 1.26.9 | 1 |
| bicarus/ | 06cab48e9334 | stdlib | 1.26.9 | 1 |
| binhex/ | fb8952921ab6 | stdlib | 1.26.9 | 1 |
| binrc/ | e199c334b957 | stdlib | 1.26.9 | 1 |
| binwiederhier/ | 6ef4b819f722 | stdlib | 1.26.9 | 1 |
| binwiederhier/ | 83e2e43d9956 | stdlib | 1.26.9 | 1 |
| bitnamilegacy/ | 00176a47afa0 | stdlib | 1.26.9 | 1 |
| bitnamilegacy/ | 15d4647fd491 | stdlib | 1.26.9 | 1 |
| bitnamilegacy/ | 9cfd2df1294d | stdlib | 1.26.9 | 1 |
| bitnamilegacy/ | e6f6ddcce2f1 | stdlib | 1.26.9 | 1 |