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
- 5,263
- of 18,131 indexed, latest versions
- Container images
- 6,077
- 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 5,263 of 18,131 indexed charts deploy, on 6,077 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 | 6,077 |
| 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
5,263 by stars
| Chart | Latest | Affected images | Radar Score |
|---|
Container images carrying it
6,077 by charts deploying them
A fixed version is listed for 1 of the 2 affected packages.
| Container image | Digest | Package | Fixed in | Used by |
|---|---|---|---|---|
| library/ | 92dc86967801 | stdlib | 1.26.9 | 1 |
| library/ | 9382e4f6f7f0 | stdlib | 1.26.9 | 1 |
| library/ | bf577825b52a | stdlib | 1.26.9 | 1 |
| library/ | ccb8f749bb5e | stdlib | 1.26.9 | 1 |
| library/ | d58ac93387f6 | stdlib | 1.26.9 | 1 |
| library/ | e2bde46db656 | stdlib | 1.26.9 | 1 |
| library/ | 0764f1952d72 | stdlib | 1.26.9 | 1 |
| library/ | 1cfc36e2e5e6 | stdlib | 1.26.9 | 1 |
| library/ | 2d5fce3229ae | stdlib | 1.26.9 | 1 |
| library/ | 3290c829aa05 | stdlib | 1.26.9 | 1 |
| library/ | 4063edae0717 | stdlib | 1.26.9 | 1 |
| library/ | 777787bbb4c7 | stdlib | 1.26.9 | 1 |
| library/ | 8b3fb2423a8c | stdlib | 1.26.9 | 1 |
| library/ | 952d157e28d5 | stdlib | 1.26.9 | 1 |
| library/ | ac8f88a6494b | stdlib | 1.26.9 | 1 |
| library/ | ad7a43eb7e33 | stdlib | 1.26.9 | 1 |
| library/ | b270f5e24283 | stdlib | 1.26.9 | 1 |
| library/ | b3f2bd84176a | stdlib | 1.26.9 | 1 |
| library/ | b7752304692b | stdlib | 1.26.9 | 1 |
| library/ | bca70839d953 | stdlib | 1.26.9 | 1 |
| library/ | c0d27f305460 | stdlib | 1.26.9 | 1 |
| library/ | c8cd23806eef | stdlib | 1.26.9 | 1 |
| library/ | ccbe811b8575 | stdlib | 1.26.9 | 1 |
| library/ | d402af4147fc | stdlib | 1.26.9 | 1 |
| library/ | d6c6ae7df4a0 | stdlib | 1.26.9 | 1 |
| library/ | df3dbf761551 | stdlib | 1.26.9 | 1 |
| library/ | f576cdc17cc3 | stdlib | 1.26.9 | 1 |
| library/ | 0ad6861379c9 | stdlib | 1.26.9 | 1 |
| library/ | ced93c701875 | stdlib | 1.26.9 | 1 |
| library/ | 03652c675ae1 | stdlib | 1.26.9 | 1 |
| library/ | 073e7c8b84e2 | stdlib | 1.26.9 | 1 |
| library/ | 14bfab572eec | stdlib | 1.26.9 | 1 |
| library/ | 2d1e636f0778 | stdlib | 1.26.9 | 1 |
| library/ | 2f439458ab6a | stdlib | 1.26.9 | 1 |
| library/ | 304ab8135187 | stdlib | 1.26.9 | 1 |
| library/ | 3a82e1f56c8f | stdlib | 1.26.9 | 1 |
| library/ | 3e7dd0bfd7bf | stdlib | 1.26.9 | 1 |
| library/ | 42df6755a411 | stdlib | 1.26.9 | 1 |
| library/ | 44d837eb4c2e | stdlib | 1.26.9 | 1 |
| library/ | 468e1f126ca5 | stdlib | 1.26.9 | 1 |
| library/ | 557fea37a744 | stdlib | 1.26.9 | 1 |
| library/ | 5c265bf1fd30 | stdlib | 1.26.9 | 1 |
| library/ | 6567bca8d7bc | stdlib | 1.26.9 | 1 |
| library/ | 69e8582b781c | stdlib | 1.26.9 | 1 |
| library/ | 6eb0add3b77c | stdlib | 1.26.9 | 1 |
| library/ | 7062a2109c4b | stdlib | 1.26.9 | 1 |
| library/ | 7c8f48705831 | stdlib | 1.26.9 | 1 |
| library/ | 7e2070cf6ad0 | stdlib | 1.26.9 | 1 |
| library/ | 7e5df973a748 | stdlib | 1.26.9 | 1 |
| library/ | 8775adb39f0d | stdlib | 1.26.9 | 1 |