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
- 5,231
- of 18,108 indexed, latest versions
- Container images
- 6,040
- 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 5,231 of 18,108 indexed charts deploy, on 6,040 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 | 6,040 |
| 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
5,231 by stars
Container images carrying it
6,040 by charts deploying them
A fixed version is listed for 1 of the 2 affected packages.
| Container image | Digest | Package | Fixed in | Used by |
|---|---|---|---|---|
| akeyless/ | 996cd9afb3b4 | stdlib | 1.26.9 | 1 |
| aktosecurity/ | 853e37321e6e | stdlib | 1.26.9 | 1 |
| aktosecurity/ | 5a0c66e59678 | stdlib | 1.26.9 | 1 |
| aktosecurity/ | d9d0e7c78578 | stdlib | 1.26.9 | 1 |
| aktosecurity/ | 46ed5bcb04b2 | stdlib | 1.26.9 | 1 |
| aktosecurity/ | a6218d07e84f | stdlib | 1.26.9 | 1 |
| aktosecurity/ | 12ed2544756f | stdlib | 1.26.9 | 1 |
| aktosecurity/ | 1a1bc76d50fe | stdlib | 1.26.9 | 1 |
| aktosecurity/ | 3e506f5e5f47 | stdlib | 1.26.9 | 1 |
| aktosecurity/ | c8266e943ff9 | stdlib | 1.26.9 | 1 |
| alazidis/ | 602d4f7f090c | stdlib | 1.26.9 | 1 |
| alcounit/ | c64222f9e663 | stdlib | 1.26.9 | 1 |
| alcounit/ | 4bd10defc324 | stdlib | 1.26.9 | 1 |
| alcounit/ | 668e7aee5e5c | stdlib | 1.26.9 | 1 |
| alcounit/ | f0964cda6da6 | stdlib | 1.26.9 | 1 |
| alex6021710/ | 6c7a47e470c3 | stdlib | 1.26.9 | 1 |
| alex6021710/ | 31e533cf7cd3 | stdlib | 1.26.9 | 1 |
| alex6021710/ | 744b8a924f35 | stdlib | 1.26.9 | 1 |
| alex6021710/ | 5837d9b30cc7 | stdlib | 1.26.9 | 1 |
| alex6021710/ | f73e8d60fd03 | stdlib | 1.26.9 | 1 |
| alireza7/ | 02aa86983cdb | stdlib | 1.26.9 | 1 |
| allegroai/ | 772827a01bb5 | stdlib | 1.26.9 | 1 |
| almasood/ | 6ffac9b63cdf | stdlib | 1.26.9 | 1 |
| almir/ | 1698346f6077 | stdlib | 1.26.9 | 1 |
| almorgv/ | 5f2a7d2b44d8 | stdlib | 1.26.9 | 1 |
| alpine/ | 062a01ad7a0e | stdlib | 1.26.9 | 1 |
| alpine/ | 66b210a97bc0 | stdlib | 1.26.9 | 1 |
| alpine/ | c0280cf95723 | stdlib | 1.26.9 | 1 |
| alpine/ | 105741fa6621 | stdlib | 1.26.9 | 1 |
| alpine/ | 905a068da431 | stdlib | 1.26.9 | 1 |
| alpine/ | 00ac10bcb759 | stdlib | 1.26.9 | 1 |
| alpine/ | 21b24e6bf801 | stdlib | 1.26.9 | 1 |
| alpine/ | 6dbe6f391eda | stdlib | 1.26.9 | 1 |
| alpine/ | 7a319b15cfc9 | stdlib | 1.26.9 | 1 |
| alpine/ | 7e1e7d5b7a96 | stdlib | 1.26.9 | 1 |
| alpine/ | 9c4976d47656 | stdlib | 1.26.9 | 1 |
| alpine/ | a41efe02a041 | stdlib | 1.26.9 | 1 |
| alpine/ | b421c2e9419e | stdlib | 1.26.9 | 1 |
| alpine/ | b7a12c5ddf26 | stdlib | 1.26.9 | 1 |
| alpine/ | bd01dae02676 | stdlib | 1.26.9 | 1 |
| alpine/ | cd560fce90f7 | stdlib | 1.26.9 | 1 |
| alpine/ | d870622d0040 | stdlib | 1.26.9 | 1 |
| alpine/ | e5c0b053fed7 | stdlib | 1.26.9 | 1 |
| alpine/ | eec354133193 | stdlib | 1.26.9 | 1 |
| alpine/ | fc059f056ad0 | stdlib | 1.26.9 | 1 |
| alpine/ | 1ee9df6316d4 | stdlib | 1.26.9 | 1 |
| alpine/ | 2c59a3f0726c | stdlib | 1.26.9 | 1 |
| alpine/ | c4a11ae9a1cb | stdlib | 1.26.9 | 1 |
| altinity/ | 1d6f18dbd599 | stdlib | 1.26.9 | 1 |
| altinity/ | 4baec90b20cd | stdlib | 1.26.9 | 1 |