5.8
CVE-2026-55767
- EPSS 0.11%
- Veröffentlicht 23.06.2026 15:05:05
- Zuletzt bearbeitet 26.06.2026 19:34:41
- Quelle security-advisories@github.com
- CVE-Watchlists
- Unerledigt
LoginGuzzle: Dot-Only Cookie Domains Match All Hosts in guzzlehttp/guzzle
Guzzle is an extensible PHP HTTP client. Prior to 7.12.1, CookieJar incorrectly accepts cookies with a dot-only Domain attribute and whitespace-padded variants. SetCookie::matchesDomain() removes leading dots from the cookie domain, normalizing dot-only values to the empty string; SetCookie::validate() only rejected a strictly empty domain, so these cookies could be stored and the empty normalized domain was treated as matching any request host. An attacker-controlled origin that an application requests with a shared cookie jar can therefore set a cookie that Guzzle later sends to unrelated hosts using the same jar. This may allow cookie injection or session fixation against downstream services, depending on how those services interpret the injected cookie. This vulnerability is fixed in 7.12.1.
| Typ | Quelle | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 0.11% | 0.016 |
| Quelle | Base Score | Exploit Score | Impact Score | Vector String |
|---|---|---|---|---|
| security-advisories@github.com | 5.8 | 3.9 | 1.4 |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
|
CWE-1286 Improper Validation of Syntactic Correctness of Input
The product receives input that is expected to be well-formed - i.e., to comply with a certain syntax - but it does not validate or incorrectly validates that the input complies with the syntax.
CWE-346 Origin Validation Error
The product does not properly verify that the source of data or communication is valid.
https://github.com/guzzle/guzzle/security/advisories/GHSA-cwxw-98qj-8qjx