Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 8.2 | High | 4.0 | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | CNA (VulnCheck) |
- CISA KEV Not listed.
- EPSS 0.0037, the 30th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 13:57 UTC First seen by agentprime
- 31 Oct 2026, 13:57 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-wm3w-8rrp-j577
- OSV: GHSA-wm3w-8rrp-j577
- github.com/guzzle/guzzle/security/advisories/GHSA-wm3w-8rrp-j577
- nvd.nist.gov/vuln/detail/CVE-2026-67355
- github.com/guzzle/guzzle/pull/3901
- github.com/guzzle/guzzle/commit/7b68220d6543f6f80fe62e633361fc9d4ead14d4
- github.com/guzzle/guzzle
- github.com/guzzle/guzzle/releases/tag/7.15.1
- www.vulncheck.com/advisories/guzzlehttp-guzzle-before-host-only-cookie-scope