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 |
|---|---|---|---|---|
| speckle/ | f6221ff308e9 | stdlib | 1.26.9 | 1 |
| spectolabs/ | 250986d58ed4 | stdlib | 1.26.9 | 1 |
| splatform/ | 886311c331b9 | stdlib | 1.26.9 | 1 |
| splunk/ | c4e0d3146226 | stdlib | 1.26.9 | 1 |
| springhack/ | 4aceb821da88 | stdlib | 1.26.9 | 1 |
| sslhep/ | c935e123030d | stdlib | 1.26.9 | 1 |
| sstarcher/ | 2d43c390cb19 | stdlib | 1.26.9 | 1 |
| sstarcher/ | 11769d01ba35 | stdlib | 1.26.9 | 1 |
| sstarcher/ | 1f8cae8cfa80 | stdlib | 1.26.9 | 1 |
| stakater/ | 382cd9572352 | stdlib | 1.26.9 | 1 |
| stakater/ | 86b24cdef409 | stdlib | 1.26.9 | 1 |
| stakater/ | c1226e5270cd | stdlib | 1.26.9 | 1 |
| stakater/ | 450415ce1b4e | stdlib | 1.26.9 | 1 |
| stakater/ | 3409565b1ef5 | stdlib | 1.26.9 | 1 |
| stakater/ | f4b87a8e56d4 | stdlib | 1.26.9 | 1 |
| stakater/ | 37ce9acf2722 | stdlib | 1.26.9 | 1 |
| stakater/ | 39107924063e | stdlib | 1.26.9 | 1 |
| stakater/ | 97bf456cc97c | stdlib | 1.26.9 | 1 |
| stakkato95/ | 5d48906d66b3 | stdlib | 1.26.9 | 1 |
| stakkato95/ | 3cbe857234f2 | stdlib | 1.26.9 | 1 |
| stakkato95/ | 8412d8a8cac3 | stdlib | 1.26.9 | 1 |
| stakkato95/ | 456049efee9a | stdlib | 1.26.9 | 1 |
| stashapp/ | 24dbd7607174 | stdlib | 1.26.9 | 1 |
| stashapp/ | df744af5a0c9 | stdlib | 1.26.9 | 1 |
| stashapp/ | a534c8afdf39 | stdlib | 1.26.9 | 1 |
| staslevchenko/ | e1b5de030254 | stdlib | 1.26.9 | 1 |
| statcan/ | d7d6bd180c46 | stdlib | 1.26.9 | 1 |
| statcan/ | bc361ee7748f | stdlib | 1.26.9 | 1 |
| statping/ | 32f26fffca46 | stdlib | 1.26.9 | 1 |
| stevenweathers/ | c7eb7b10f186 | stdlib | 1.26.9 | 1 |
| streamnative/ | 11bceacec8fb | stdlib | 1.26.9 | 1 |
| streamnative/ | ebcf7f033b54 | stdlib | 1.26.9 | 1 |
| streamnative/ | 4176923db03c | stdlib | 1.26.9 | 1 |
| streamnative/ | 82434bb2a8ad | stdlib | 1.26.9 | 1 |
| streamnative/ | 31533fa9fab7 | stdlib | 1.26.9 | 1 |
| streamnative/ | e492b6608418 | stdlib | 1.26.9 | 1 |
| stubin87/ | 2e5c42e92ec8 | stdlib | 1.26.9 | 1 |
| su541/ | 371ee33f83c1 | stdlib | 1.26.9 | 1 |
| subspacecommunity/ | e2042b63fb35 | stdlib | 1.26.9 | 1 |
| summerwind/ | 2128f81dbede | stdlib | 1.26.9 | 1 |
| sumuduliya/ | b7788a2984a3 | stdlib | 1.26.9 | 1 |
| supabase/ | 385184459f57 | stdlib | 1.26.9 | 1 |
| supabase/ | 7174d551d720 | stdlib | 1.26.9 | 1 |
| supabase/ | ba4ddc594b0b | stdlib | 1.26.9 | 1 |
| supabase/ | f371b5f3f2ac | stdlib | 1.26.9 | 1 |
| superorbital/ | d59732f61d6e | stdlib | 1.26.9 | 1 |
| superque/ | 28ca636d1dee | stdlib | 1.26.9 | 1 |
| superseriousbusiness/ | 0078ca451dda | stdlib | 1.26.9 | 1 |
| supporttools/ | ab55fd5a69c3 | stdlib | 1.26.9 | 1 |
| supporttools/ | cbd45f6b02b8 | stdlib | 1.26.9 | 1 |