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
- 5,264
- of 18,143 indexed, latest versions
- Container images
- 6,101
- 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 5,264 of 18,143 indexed charts deploy, on 6,101 images.
| Affected package | Affected versions | Fixed in | Images |
|---|---|---|---|
| stdlibgolang | go1.13, go1.13.1, go1.13.3, go1.13.4+208 more | 1.26.9 | 6,101 |
| golang-1.19deb | 1.19.8-2 | no fix listed | 1 |
- OSV records
- DEBIAN-CVE-2026-56866GO-2026-6605
- Also known as
- BIT-golang-2026-56866
- Trending
- Rank 14 in indexed charts, since 9 Oct 2026. See the ranking →
Charts affected
5,264 by stars
| Chart | Latest | Affected images | Radar Score |
|---|
Container images carrying it
6,101 by charts deploying them
A fixed version is listed for 1 of the 2 affected packages.
| Container image | Digest | Package | Fixed in | Used by |
|---|---|---|---|---|
| librenms/ | 814e3fb8d837 | stdlib | 1.26.9 | 1 |
| lifailon/ | ea37e4b6b952 | stdlib | 1.26.9 | 1 |
| lightstep/ | c800e05e1eff | stdlib | 1.26.9 | 1 |
| linode/ | 09f3282bf53d | stdlib | 1.26.9 | 1 |
| linode/ | ea915835a1c6 | stdlib | 1.26.9 | 1 |
| linuxchina/ | f758e2e567ee | stdlib | 1.26.9 | 1 |
| linuxserver/ | 241009026e6f | stdlib | 1.26.9 | 1 |
| linuxserver/ | 938810eca3d3 | stdlib | 1.26.9 | 1 |
| linuxserver/ | b38cae89eb9d | stdlib | 1.26.9 | 1 |
| linuxserver/ | b7f906899cd3 | stdlib | 1.26.9 | 1 |
| linuxserver/ | bb0510fedc3b | stdlib | 1.26.9 | 1 |
| linuxserver/ | 216ca1ce9da7 | stdlib | 1.26.9 | 1 |
| linuxserver/ | 6bcf5d2f5a26 | stdlib | 1.26.9 | 1 |
| lishimeng/ | 3d5752dac834 | stdlib | 1.26.9 | 1 |
| lishimeng/ | c79a67657baf | stdlib | 1.26.9 | 1 |
| lishimeng/ | 3d00485e64dc | stdlib | 1.26.9 | 1 |
| lishimeng/ | 3e7d05ded625 | stdlib | 1.26.9 | 1 |
| lishimeng/ | 0970dfe5dc8f | stdlib | 1.26.9 | 1 |
| lishimeng/ | 8145c3dc83c8 | stdlib | 1.26.9 | 1 |
| lishimeng/ | 9b2f8be6c7d3 | stdlib | 1.26.9 | 1 |
| lishimeng/ | e0b8d2d8ca28 | stdlib | 1.26.9 | 1 |
| listmonk/ | bf3903d54a46 | stdlib | 1.26.9 | 1 |
| litestream/ | c5a1e1b01916 | stdlib | 1.26.9 | 1 |
| livekit/ | 1ab01641b366 | stdlib | 1.26.9 | 1 |
| livekit/ | ecf1409c75e0 | stdlib | 1.26.9 | 1 |
| livekit/ | 3602a85840d5 | stdlib | 1.26.9 | 1 |
| livekit/ | 8391fd1b834f | stdlib | 1.26.9 | 1 |
| livekit/ | b1281e66e35e | stdlib | 1.26.9 | 1 |
| livekit/ | d0c04791bf63 | stdlib | 1.26.9 | 1 |
| lmierzwa/ | 3751e5eed656 | stdlib | 1.26.9 | 1 |
| lmierzwa/ | 57c7f1e63e76 | stdlib | 1.26.9 | 1 |
| lmierzwa/ | d417abe7ddb5 | stdlib | 1.26.9 | 1 |
| lmierzwa/ | f5d0a0ff4062 | stdlib | 1.26.9 | 1 |
| localstack/ | 9d278167f2b7 | stdlib | 1.26.9 | 1 |
| localstack/ | aa5632e041ca | stdlib | 1.26.9 | 1 |
| loeken/ | b1dff5b4c593 | stdlib | 1.26.9 | 1 |
| loftsh/ | 310cc7d690f5 | stdlib | 1.26.9 | 1 |
| loftsh/ | 25deb9bd2683 | stdlib | 1.26.9 | 1 |
| loftsh/ | 023b13bf5898 | stdlib | 1.26.9 | 1 |
| log10x/ | 7d6a79dacd58 | stdlib | 1.26.9 | 1 |
| logiqai/ | 65b996bc7bdc | stdlib | 1.26.9 | 1 |
| logiqai/ | f5b551bca98e | stdlib | 1.26.9 | 1 |
| logiqai/ | 798306811f2d | stdlib | 1.26.9 | 1 |
| logiqai/ | 3e149f6781b8 | stdlib | 1.26.9 | 1 |
| logiqai/ | 4a746ff04d6a | stdlib | 1.26.9 | 1 |
| lokxy/ | e4ac800dc55d | stdlib | 1.26.9 | 1 |
| longhornio/ | 5b0bc1b88f0c | stdlib | 1.26.9 | 1 |
| longhornio/ | 7372f3c59239 | stdlib | 1.26.9 | 1 |
| longhornio/ | 83b79f57043f | stdlib | 1.26.9 | 1 |
| longhornio/ | ede61fe2a472 | stdlib | 1.26.9 | 1 |