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 |
|---|---|---|---|---|
| rancher/ | deac027820ae | stdlib | 1.26.9 | 1 |
| rancher/ | 6cbc1e932b5b | stdlib | 1.26.9 | 1 |
| rancher/ | a41cd716c412 | stdlib | 1.26.9 | 1 |
| rancher/ | 3126395b966c | stdlib | 1.26.9 | 1 |
| rancher/ | 34fa058fe453 | stdlib | 1.26.9 | 1 |
| rancher/ | 9813f85653c8 | stdlib | 1.26.9 | 1 |
| raspbernetes/ | a552705225fd | stdlib | 1.26.9 | 1 |
| ravendb/ | 511050205ac5 | stdlib | 1.26.9 | 1 |
| rayselfs/ | 562e5b2f81ce | stdlib | 1.26.9 | 1 |
| rclone/ | 08e1af3c8814 | stdlib | 1.26.9 | 1 |
| rclone/ | 1e6eeabddc01 | stdlib | 1.26.9 | 1 |
| rclone/ | a693c46a6b8b | stdlib | 1.26.9 | 1 |
| rclone/ | f2fc45c8bc57 | stdlib | 1.26.9 | 1 |
| reallibrephotos/ | 52371b6769d4 | stdlib | 1.26.9 | 1 |
| reaper99/ | 7f7ec3aeb88c | stdlib | 1.26.9 | 1 |
| redislabs/ | 9078e713bb6a | stdlib | 1.26.9 | 1 |
| redislabs/ | ecb101af0506 | stdlib | 1.26.9 | 1 |
| redislabs/ | 33561794c5c8 | stdlib | 1.26.9 | 1 |
| redpandadata/ | 12bc33b3e334 | stdlib | 1.26.9 | 1 |
| redpandadata/ | 56da99e8d0d3 | stdlib | 1.26.9 | 1 |
| regclient/ | 3d8d8e40afb7 | stdlib | 1.26.9 | 1 |
| releaseargus/ | e07088252d03 | stdlib | 1.26.9 | 1 |
| replicated/ | 8751b4963250 | stdlib | 1.26.9 | 1 |
| reportportal/ | bd5cb2bd57f3 | stdlib | 1.26.9 | 1 |
| reportportal/ | 1b3d70635332 | stdlib | 1.26.9 | 1 |
| reportportal/ | da5d8e1395fe | stdlib | 1.26.9 | 1 |
| reportportal/ | 2b27a2d7a87d | stdlib | 1.26.9 | 1 |
| reportportal/ | 7f78a31a8c8d | stdlib | 1.26.9 | 1 |
| restic/ | 136600b6ff68 | stdlib | 1.26.9 | 1 |
| restic/ | 579e4e6a4931 | stdlib | 1.26.9 | 1 |
| restic/ | d2aff06f47eb | stdlib | 1.26.9 | 1 |
| resurfaceio/ | d5cda2f64109 | stdlib | 1.26.9 | 1 |
| rezachalak/ | 34f694325191 | stdlib | 1.26.9 | 1 |
| ribbybibby/ | 998184c51a00 | stdlib | 1.26.9 | 1 |
| richardjennings/ | 66424aca125d | stdlib | 1.26.9 | 1 |
| rimusz/ | b9a178ca76ef | stdlib | 1.26.9 | 1 |
| robiningelbrecht/ | 40842cdfd616 | stdlib | 1.26.9 | 1 |
| robjuz/ | 805c7bab76df | stdlib | 1.26.9 | 1 |
| robotnik/ | 43b177ffbb72 | stdlib | 1.26.9 | 1 |
| robotshop/ | de81f1d07b02 | stdlib | 1.26.9 | 1 |
| robotshop/ | 119b545823cd | stdlib | 1.26.9 | 1 |
| robustadev/ | 0457a51e36e8 | stdlib | 1.26.9 | 1 |
| rocm/ | 26212c665aab | stdlib | 1.26.9 | 1 |
| rogerrum/ | 827593369625 | stdlib | 1.26.9 | 1 |
| rokk42/ | dfc850a5db9e | stdlib | 1.26.9 | 1 |
| rook/ | 2c3a65786d3c | stdlib | 1.26.9 | 1 |
| rook/ | 944a1dd70496 | stdlib | 1.26.9 | 1 |
| rookout/ | 0d083f3ef1a7 | stdlib | 1.26.9 | 1 |
| rotationalio/ | f8d8b694515a | stdlib | 1.26.9 | 1 |
| rotationalio/ | 3ab583519215 | stdlib | 1.26.9 | 1 |