CVE-2026-67339guzzlehttp/guzzle before 7.14.2 Proxy-Authorization Header Disclosure
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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guzzlehttp/guzzle versions before 7.14.2 fail to properly isolate Proxy-Authorization headers from origin servers in cURL handlers. Attackers can capture proxy credentials through origin server access logs when requests are redirected, bypassed, or sent through SOCKS proxies that Guzzle misclassifies as direct connections.
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- CWE-200
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
guzzle guzzle guzzle:guzzle (from the name) | before 7.14.2; 7.14.2 not affected | CNA record |
References
- https://github.com/guzzle/guzzle/security/advisories/GHSA-94pj-82f3-465wvendor-advisory
- https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-proxy-authorization-header-disclosurethird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.