Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| guzzle | guzzle | < 7.15.1 | 7.15.1 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | guzzle | 7.15.1-1 | — |
| Debian 13 | guzzle | No fix yet | — |
| Debian 12 | guzzle | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | guzzle | No fix yet | — |
| Ubuntu 26.04 LTS | guzzle | No fix yet | — |
| Ubuntu 24.04 LTS | guzzle | No fix yet | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | nextcloud-server-33 | 33.0.6-r8 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Packagist | guzzlehttp/guzzle | < 7.15.1 | 7.15.1 | GHSA-f283-ghqc-fg79 |
References
- GitHub Security Advisory (GHSA-f283-ghqc-fg79) vendor-advisory
- VulnCheck Advisory: guzzlehttp/guzzle before 7.15.1 Unbounded Cookie Denial of Service third-party-advisory