CVE catalog
CVE-2026-67353
guzzlehttp/guzzle versions before 7.15.1 contain a denial of service vulnerability in the CookieJar that accepts unlimited Set-Cookie header fields with no size restrictions. Attackers can return many
- Severity
- Medium · CVSS 6.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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
- 0.42% · Oct 25, 2026
guzzlehttp/guzzle versions before 7.15.1 contain a denial of service vulnerability in the CookieJar that accepts unlimited Set-Cookie header fields with no size restrictions. Attackers can return many large cookies from a malicious server, causing Guzzle to store excessive data in memory and generate oversized Cookie headers that fail in handlers or destination servers.
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 | 7.15.1-1 | not yet assigned | Not reported | Not reported |
| Debian | guzzle | source | forky | 7.15.1-1 | 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-2026-67353]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-67353]
- [https://security-tracker.debian.org/tracker/CVE-2026-67353]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67353.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]