CVE-2026-82209 Affecting curl package, versions <8.22.0-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-MINIMOSLATEST-CURL-19706578
- published13 Sept 2026
- disclosed6 Sept 2026
Introduced: 6 Sep 2026
NewCVE-2026-82209 (opens in a new tab)How to fix?
Upgrade Minimos:latest curl to version 8.22.0-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream curl package and not the curl package as distributed by Minimos.
See How to fix? for Minimos:latest relevant fixed versions and status.
When libpsl support is enabled, libcurl fails to enforce the Public Suffix
List boundary check when processing a Set-Cookie header where the Domain
attribute explicitly matches an origin host that is itself a public suffix
(e.g., Domain=co.uk set by co.uk).
Instead of coercing it into a strict host-only cookie, libcurl saves the
cookie with wildcard domain scope (.co.uk). Consequently, the cookie is
inappropriately included in subsequent outbound requests or HTTP redirects to
arbitrary sibling subdomains under the same public suffix (e.g.,
attacker.co.uk).
References
- https://www.cve.org/CVERecord?id=CVE-2026-82209
- https://github.com/advisories/GHSA-3hpw-4mfr-9f85
- https://osv.dev/vulnerability/MINI-448j-982p-vm89
- https://osv.dev/vulnerability/CVE-2026-82209
- https://curl.se/docs/CVE-2026-82209.html
- https://curl.se/docs/CVE-2026-82209.json
- https://hackerone.com/reports/3972385