CVE catalog
CVE-2026-67339
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
- Severity
- Medium · CVSS 6.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.37% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | guzzle | sid | 7.15.5-1 | fixed |
| Debian | guzzle | forky | 7.15.5-1 | fixed |
| Debian | guzzle | trixie | 7.9.2-0.1 | vulnerable |
| Debian | guzzle | bookworm | 7.4.5-1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | guzzle | source | sid | 7.14.2-1 | not yet assigned | Not reported | Not reported |
| Debian | guzzle | source | forky | 7.14.2-1 | not yet assigned | Not reported | Not reported |
| Debian | guzzle | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | guzzle | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
Notes
[trixie] guzzle: Minor issue [bookworm] guzzle: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [php-guzzlehttp-guzzle]Affected
Source package: [guzzle]
Details (2)
7.4.5-1· all · bookwormAffected
nvd · guzzle · debian · bookworm; nvd · guzzle · debian · 12
7.4.5-1· all · bookwormAffected
nvd · guzzle · debian · bookworm; nvd · guzzle · debian · 12
[Debian 13 (Trixie)]
- [php-guzzlehttp-guzzle]Affected
Source package: [guzzle]
Details (2)
7.9.2-0.1· all · trixieAffected
nvd · guzzle · debian · 13
7.9.2-0.1· all · trixieAffected
nvd · guzzle · debian · 13
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-67339]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-67339]
- [https://security-tracker.debian.org/tracker/CVE-2026-67339]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67339.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]