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
- 5,377
- of 18,104 indexed, latest versions
- Container images
- 6,223
- 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 5,377 of 18,104 indexed charts deploy, on 6,223 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 | 6,223 |
| 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
5,377 by stars
Container images carrying it
6,223 by charts deploying them
A fixed version is listed for 1 of the 2 affected packages.
| Container image | Digest | Package | Fixed in | Used by |
|---|---|---|---|---|
| abutaha/ | 190ed2d1dfc8 | stdlib | 1.26.9 | 2 |
| alazidis/ | 0e8c84152201 | stdlib | 1.26.9 | 2 |
| alpine/ | 832b1cd1a271 | stdlib | 1.26.9 | 2 |
| alpine/ | 048f8d9c8cc7 | stdlib | 1.26.9 | 2 |
| alpine/ | b421c2e9419e | stdlib | 1.26.9 | 2 |
| alpine/ | 9ccd82364762 | stdlib | 1.26.9 | 2 |
| alpine/ | ec8f734b0a10 | stdlib | 1.26.9 | 2 |
| altinity/ | cd9252644ce0 | stdlib | 1.26.9 | 2 |
| altinity/ | db7dde971407 | stdlib | 1.26.9 | 2 |
| altinity/ | 85b4fdbae053 | stdlib | 1.26.9 | 2 |
| altinity/ | df3d57215356 | stdlib | 1.26.9 | 2 |
| amazon/ | b55277652ea8 | stdlib | 1.26.9 | 2 |
| amazon/ | c9b14856fd22 | stdlib | 1.26.9 | 2 |
| apache/ | 3a4422656592 | stdlib | 1.26.9 | 2 |
| apache/ | 641237e0299b | stdlib | 1.26.9 | 2 |
| apache/ | 67d50e4deff4 | stdlib | 1.26.9 | 2 |
| apache/ | afe59523a6c8 | stdlib | 1.26.9 | 2 |
| apecloud/ | 94041b080510 | stdlib | 1.26.9 | 2 |
| apecloud/ | 8c8451abf728 | stdlib | 1.26.9 | 2 |
| aquasec/ | ea3e33bc3c4e | stdlib | 1.26.9 | 2 |
| assistiot/ | ad8f72108636 | stdlib | 1.26.9 | 2 |
| ayushsobti/ | 4c94e8f8924e | stdlib | 1.26.9 | 2 |
| binwiederhier/ | 4a7d0f0adc6d | stdlib | 1.26.9 | 2 |
| binwiederhier/ | 4c599cf08189 | stdlib | 1.26.9 | 2 |
| bitnami/ | 27e3b3fe7123 | stdlib | 1.26.9 | 2 |
| bitnamilegacy/ | 00176a47afa0 | stdlib | 1.26.9 | 2 |
| bitnamilegacy/ | d17df1f9d745 | stdlib | 1.26.9 | 2 |
| bitnamilegacy/ | a0a972324d93 | stdlib | 1.26.9 | 2 |
| bitnamilegacy/ | 33ce23601fc9 | stdlib | 1.26.9 | 2 |
| bitnamilegacy/ | 4fe2bd7b4036 | stdlib | 1.26.9 | 2 |
| bitnamilegacy/ | 7e7ebb082031 | stdlib | 1.26.9 | 2 |
| bitnamilegacy/ | 5927ff3702df | stdlib | 1.26.9 | 2 |
| bitnamilegacy/ | 10ed1ea3c8d1 | stdlib | 1.26.9 | 2 |
| bitnami/ | 33a5a129cadc | stdlib | 1.26.9 | 2 |
| bitnamisecure/ | 72ae5bd9715f | stdlib | 1.26.9 | 2 |
| bitpoke/ | f44fa86ab27e | stdlib | 1.26.9 | 2 |
| bitpoke/ | d86560c75bed | stdlib | 1.26.9 | 2 |
| bloomberg/ | f7c60d319150 | stdlib | 1.26.9 | 2 |
| burningalchemist/ | 6c554722facc | stdlib | 1.26.9 | 2 |
| cagriekin/ | 111ccc617ce7 | stdlib | 1.26.9 | 2 |
| casbin/ | 7729da148c61 | stdlib | 1.26.9 | 2 |
| cesanta/ | 4d16885f3d4c | stdlib | 1.26.9 | 2 |
| chankh/ | 963c44c7f8b1 | stdlib | 1.26.9 | 2 |
| chrislusf/ | db095fe8a8d6 | stdlib | 1.26.9 | 2 |
| clickhouse/ | ed9640bfff07 | stdlib | 1.26.9 | 2 |
| cloudflare/ | 61f608cd1123 | stdlib | 1.26.9 | 2 |
| cloudflare/ | 6d91c121b803 | stdlib | 1.26.9 | 2 |
| containersol/ | a914972d19ad | stdlib | 1.26.9 | 2 |
| coredns/ | 9b9128672209 | stdlib | 1.26.9 | 2 |
| crate/ | b8d89fa5d19b | stdlib | 1.26.9 | 2 |