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
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 |
|---|---|---|---|---|
| tinymediamanager/ | 48c15784a127 | stdlib | 1.26.9 | 1 |
| tksky1/ | ec7b889f380f | stdlib | 1.26.9 | 1 |
| tobiasbp/ | 14bee6e33a26 | stdlib | 1.26.9 | 1 |
| tobiasehlert/ | cf09259ad0ea | stdlib | 1.26.9 | 1 |
| tobirachel/ | 7d9f37154994 | stdlib | 1.26.9 | 1 |
| tolgee/ | 9f2c691deb24 | stdlib | 1.26.9 | 1 |
| toniblyx/ | 9dbcc3c9abd7 | stdlib | 1.26.9 | 1 |
| toucansoftware/ | c187b1fba501 | stdlib | 1.26.9 | 1 |
| trackerforce/ | 20235fe419e4 | stdlib | 1.26.9 | 1 |
| traefik/ | cf071f3e165c | stdlib | 1.26.9 | 1 |
| traefik/ | 6259bdda7aa6 | stdlib | 1.26.9 | 1 |
| traefik/ | 1474027c3166 | stdlib | 1.26.9 | 1 |
| traefik/ | 1699d99cb4b9 | stdlib | 1.26.9 | 1 |
| traefik/ | 2c52bb2c8480 | stdlib | 1.26.9 | 1 |
| traefik/ | 8d0f943abdbf | stdlib | 1.26.9 | 1 |
| traefik/ | d38496bf0900 | stdlib | 1.26.9 | 1 |
| traggo/ | f1ced637510e | stdlib | 1.26.9 | 1 |
| tranhailong/ | 028662749be2 | stdlib | 1.26.9 | 1 |
| treeverse/ | 556a05af968c | stdlib | 1.26.9 | 1 |
| treeverse/ | 237a17c6b2d8 | stdlib | 1.26.9 | 1 |
| treeverse/ | 478f37a6cffc | stdlib | 1.26.9 | 1 |
| treskon/ | 88e813f22347 | stdlib | 1.26.9 | 1 |
| trinodb/ | 5b5e0a97f599 | stdlib | 1.26.9 | 1 |
| trinodb/ | 6af989b0846d | stdlib | 1.26.9 | 1 |
| trinodb/ | db58cc93e593 | stdlib | 1.26.9 | 1 |
| truebyteinnovationllp/ | 1c6a945af653 | stdlib | 1.26.9 | 1 |
| tundeficky/ | 3cf9a9ce54e8 | stdlib | 1.26.9 | 1 |
| turt2live/ | bfbd459f89a5 | stdlib | 1.26.9 | 1 |
| tusproject/ | 1e457b59fd5b | stdlib | 1.26.9 | 1 |
| tusproject/ | f8088058b80f | stdlib | 1.26.9 | 1 |
| twentycrm/ | 2f78405a78be | stdlib | 1.26.9 | 1 |
| twinproduction/ | 8f38c206972e | stdlib | 1.26.9 | 1 |
| twinproduction/ | 3fff895e77d3 | stdlib | 1.26.9 | 1 |
| twinproduction/ | 49dc0d9b2e2c | stdlib | 1.26.9 | 1 |
| tykio/ | 78ffedae485e | stdlib | 1.26.9 | 1 |
| tykio/ | 10f678bfdc27 | stdlib | 1.26.9 | 1 |
| uderelier19/ | 8ab640b44e3f | stdlib | 1.26.9 | 1 |
| udhos/ | 41ab9bae6f3b | stdlib | 1.26.9 | 1 |
| udhos/ | 196ef68af380 | stdlib | 1.26.9 | 1 |
| udhos/ | 12e120d39fdb | stdlib | 1.26.9 | 1 |
| udhos/ | 3acc0e7599bf | stdlib | 1.26.9 | 1 |
| udhos/ | 5567c9363c4c | stdlib | 1.26.9 | 1 |
| udhos/ | e588db500edf | stdlib | 1.26.9 | 1 |
| udhos/ | f44ef986df49 | stdlib | 1.26.9 | 1 |
| udhos/ | 6bd2cf2ac732 | stdlib | 1.26.9 | 1 |
| udhos/ | 8a7042db82ce | stdlib | 1.26.9 | 1 |
| udhos/ | 03b08b63f524 | stdlib | 1.26.9 | 1 |
| udhos/ | e432012dd34a | stdlib | 1.26.9 | 1 |
| udhos/ | 474c467bbf42 | stdlib | 1.26.9 | 1 |
| udhos/ | 615b6a7d742e | stdlib | 1.26.9 | 1 |