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 |
|---|---|---|---|---|
| semitechnologies/ | 7a00d226f063 | stdlib | 1.26.9 | 1 |
| senthilrch/ | bf336912a191 | stdlib | 1.26.9 | 1 |
| senthilrch/ | 836a8bbe7cfb | stdlib | 1.26.9 | 1 |
| sentriz/ | a74012a6adf3 | stdlib | 1.26.9 | 1 |
| shaowenchen/ | 35575d4f2bfe | stdlib | 1.26.9 | 1 |
| shaowenchen/ | 6bac5cebd125 | stdlib | 1.26.9 | 1 |
| sharanalwar/ | 5e82950b16b7 | stdlib | 1.26.9 | 1 |
| sharat87/ | a148af533afd | stdlib | 1.26.9 | 1 |
| shenxn/ | acf31af7c111 | stdlib | 1.26.9 | 1 |
| shlomibendavid/ | a22ffbe0f04e | stdlib | 1.26.9 | 1 |
| shyim/ | a951c0e6b836 | stdlib | 1.26.9 | 1 |
| sigma2as/ | c284ead9ec3e | stdlib | 1.26.9 | 1 |
| signald/ | 0ffad7ccc2eb | stdlib | 1.26.9 | 1 |
| signald/ | edbff058278c | stdlib | 1.26.9 | 1 |
| signoz/ | 7bc7de2e33c2 | stdlib | 1.26.9 | 1 |
| signoz/ | cd3ca6950df3 | stdlib | 1.26.9 | 1 |
| signoz/ | 7f351ef18e7f | stdlib | 1.26.9 | 1 |
| signoz/ | b08671f56f31 | stdlib | 1.26.9 | 1 |
| sikalabs/ | c8b0e21d61b4 | stdlib | 1.26.9 | 1 |
| sikalabs/ | 7bd267f30247 | stdlib | 1.26.9 | 1 |
| sikalabs/ | fdc0c6711add | stdlib | 1.26.9 | 1 |
| silkeh/ | 900010497f8c | stdlib | 1.26.9 | 1 |
| simonschneider/ | d674ac370f80 | stdlib | 1.26.9 | 1 |
| simpleidserver/ | 25e378d57d78 | stdlib | 1.26.9 | 1 |
| sirrend/ | 699e79e3d4e2 | stdlib | 1.26.9 | 1 |
| sky5367/ | d51bf68d4b26 | stdlib | 1.26.9 | 1 |
| sky5367/ | d3150f201471 | stdlib | 1.26.9 | 1 |
| skylenet/ | 210353ce7c89 | stdlib | 1.26.9 | 1 |
| skylenet/ | 8698903e379f | stdlib | 1.26.9 | 1 |
| slagattollas/ | 68e7f56393fc | stdlib | 1.26.9 | 1 |
| slamdev/ | a234541c9fa8 | stdlib | 1.26.9 | 1 |
| slamdev/ | 855f6625dda4 | stdlib | 1.26.9 | 1 |
| slamdev/ | b173d809132d | stdlib | 1.26.9 | 1 |
| slamdev/ | d5d6430108a3 | stdlib | 1.26.9 | 1 |
| smailkoz/ | 7b52d15de8f0 | stdlib | 1.26.9 | 1 |
| snapr/ | e9eb8287bfe1 | stdlib | 1.26.9 | 1 |
| snyk/ | fb5ad76ce84e | stdlib | 1.26.9 | 1 |
| softonic/ | f26d467b7b82 | stdlib | 1.26.9 | 1 |
| softonic/ | ab6098c04a53 | stdlib | 1.26.9 | 1 |
| softonic/ | 72017aed5902 | stdlib | 1.26.9 | 1 |
| softonic/ | 94b87f1fb362 | stdlib | 1.26.9 | 1 |
| softonic/ | 910f6de37763 | stdlib | 1.26.9 | 1 |
| softwaremill/ | dfd0d3a7246a | stdlib | 1.26.9 | 1 |
| solarwinds/ | 3c1110e8bdfb | stdlib | 1.26.9 | 1 |
| soldevelo/ | 044d16a65129 | stdlib | 1.26.9 | 1 |
| someblackmagic/ | 6eca64b6b440 | stdlib | 1.26.9 | 1 |
| sonroyaalmerol/ | 3f60f3abe990 | stdlib | 1.26.9 | 1 |
| sophos/ | f1073556b29b | stdlib | 1.26.9 | 1 |
| sorintlab/ | 36b45c0f97fc | stdlib | 1.26.9 | 1 |
| sosedoff/ | a5256d416e2e | stdlib | 1.26.9 | 1 |