Skip to main content
UNPWNED
CVE Radar
MediumcURL

CVE-2022-32205

A malicious server can serve excessive amounts of `Set-Cookie:` headers in a HTTP response to curl and curl < 7.84.0 stores all of them. A sufficiently large amount of (big) cookies make subsequent HTTP requests to this, or other servers to which the cookies match, create requests that become larger than the threshold that curl uses internally to avoid sending crazy large requests (1048576 bytes) and instead returns an error.This denial state might remain for as long as the same cookies are kept, match and haven't expired. Due to cookie matching rules, a server on `foo.example.com` can set cookies that also would match for `bar.example.com`, making it it possible for a "sister server" to effectively cause a denial of service for a sibling site on the same second level domain using this method.

CVSS Base Score
4.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Exploit Probability
98%EPSS PERCENTILE0100

More exploitable than 98% of all CVEs · Top 2%

Is your site exposed to this?

Run a free scan. UNPWNED fingerprints your stack and flags this CVE class if the affected technology is detected.

Check my site
Details
Published
2022-07-07
Last modified
2026-10-14
Affected
cURL

Data from the National Vulnerability Database (NVD), CISA KEV, and FIRST.org EPSS. This product uses the NVD API but is not endorsed or certified by the NVD. EPSS is a probability estimate, not a guarantee of exploitation.