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
- 5,339
- of 18,108 indexed, latest versions
- Container images
- 6,174
- 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 5,339 of 18,108 indexed charts deploy, on 6,174 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 | 6,174 |
| golang-1.19deb | 1.19.8-2 | no fix listed | 1 |
- OSV records
- DEBIAN-CVE-2026-56866GO-2026-6605
- Trending
- Rank 9 in indexed charts, since 9 Oct 2026. See the ranking →
Charts affected
5,339 by stars
| Chart | Latest | Affected images | Radar Score |
|---|
Container images carrying it
6,174 by charts deploying them
A fixed version is listed for 1 of the 2 affected packages.
| Container image | Digest | Package | Fixed in | Used by |
|---|---|---|---|---|
| istio/ | a78b7a165744 | stdlib | 1.26.9 | 2 |
| jaegertracing/ | 04d224a9999b | stdlib | 1.26.9 | 2 |
| jenkins/ | b470bcdc4ecd | stdlib | 1.26.9 | 2 |
| jenkins/ | c4098086090c | stdlib | 1.26.9 | 2 |
| jettech/ | c42098c8d855 | stdlib | 1.26.9 | 2 |
| jettech/ | fb7c2cd46ccf | stdlib | 1.26.9 | 2 |
| jmalloc/ | e4eaee2c7998 | stdlib | 1.26.9 | 2 |
| juicedata/ | 5e5edb62a010 | stdlib | 1.26.9 | 2 |
| juicedata/ | f918e7331c05 | stdlib | 1.26.9 | 2 |
| k0sproject/ | f04635825d51 | stdlib | 1.26.9 | 2 |
| kbudde/ | 12f27d6d84e6 | stdlib | 1.26.9 | 2 |
| kong/ | 979f12864a13 | stdlib | 1.26.9 | 2 |
| kubernetesui/ | 148991563e37 | stdlib | 1.26.9 | 2 |
| kubeshop/ | ce04897e5ea2 | stdlib | 1.26.9 | 2 |
| kubesphere/ | ed7311a0f9e4 | stdlib | 1.26.9 | 2 |
| kubesphere/ | 8d1ed5ee1d2e | stdlib | 1.26.9 | 2 |
| l7mp/ | 0d2094060b72 | stdlib | 1.26.9 | 2 |
| l7mp/ | ee34f1c04b9b | stdlib | 1.26.9 | 2 |
| lachlanevenson/ | af5cea3f2e40 | stdlib | 1.26.9 | 2 |
| langgenius/ | 09b7e8705673 | stdlib | 1.26.9 | 2 |
| library/ | 1e75d74954a4 | stdlib | 1.26.9 | 2 |
| library/ | 7cbcec0086ac | stdlib | 1.26.9 | 2 |
| library/ | 0b6d18a4a222 | stdlib | 1.26.9 | 2 |
| library/ | 3e3c176ffed1 | stdlib | 1.26.9 | 2 |
| library/ | 55131b90d48c | stdlib | 1.26.9 | 2 |
| library/ | 44a366dd7724 | stdlib | 1.26.9 | 2 |
| library/ | b8d940ca9376 | stdlib | 1.26.9 | 2 |
| library/ | 0abf60f81588 | stdlib | 1.26.9 | 2 |
| library/ | 1292844148b3 | stdlib | 1.26.9 | 2 |
| library/ | 23616f0bd3af | stdlib | 1.26.9 | 2 |
| library/ | 2bdff1534a7e | stdlib | 1.26.9 | 2 |
| library/ | 334b315c10e5 | stdlib | 1.26.9 | 2 |
| library/ | 607835cd628b | stdlib | 1.26.9 | 2 |
| library/ | d4fdec0510ad | stdlib | 1.26.9 | 2 |
| library/ | e101f9db3191 | stdlib | 1.26.9 | 2 |
| library/ | 098862b1339f | stdlib | 1.26.9 | 2 |
| library/ | 41108d183e97 | stdlib | 1.26.9 | 2 |
| library/ | 5d7043a4ffe0 | stdlib | 1.26.9 | 2 |
| library/ | d731d77bfd7a | stdlib | 1.26.9 | 2 |
| library/ | f71f6d0913c9 | stdlib | 1.26.9 | 2 |
| library/ | 212fe73edca5 | stdlib | 1.26.9 | 2 |
| library/ | ac80b6e09e5b | stdlib | 1.26.9 | 2 |
| library/ | 1a7b320b2942 | stdlib | 1.26.9 | 2 |
| library/ | 1bcddab51b80 | stdlib | 1.26.9 | 2 |
| library/ | 85319e5e541b | stdlib | 1.26.9 | 2 |
| library/ | 88fe8e0e09d6 | stdlib | 1.26.9 | 2 |
| library/ | 988010f74b61 | stdlib | 1.26.9 | 2 |
| library/ | c0d27f305460 | stdlib | 1.26.9 | 2 |
| library/ | 09f23e02d766 | stdlib | 1.26.9 | 2 |
| library/ | 1090bc3a8ccf | stdlib | 1.26.9 | 2 |