CVE-2026-8458 Affecting curl-doc package, versions <8.21.0-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-CURLDOC-17897827
- published9 Jul 2026
- disclosed3 Jul 2026
Introduced: 3 Jul 2026
NewCVE-2026-8458 (opens in a new tab)How to fix?
Upgrade Minimos:latest curl-doc to version 8.21.0-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream curl-doc package and not the curl-doc package as distributed by Minimos.
See How to fix? for Minimos:latest relevant fixed versions and status.
libcurl might in some circumstances reuse the wrong connection when asked to do Negotiate-authenticated ones, even when they are set to use different 'services'.
libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead.
When reusing a connection a range of criteria must be met. Due to a logical error in the code, a request that was issued by an application could wrongfully reuse an existing connection to the same server that was authenticated using different services.
References
- https://www.cve.org/CVERecord?id=CVE-2026-8458
- https://github.com/advisories/GHSA-88c6-6jfq-mm4q
- https://osv.dev/vulnerability/MINI-93g8-4h65-f27c
- https://osv.dev/vulnerability/CVE-2026-8458
- https://curl.se/docs/CVE-2026-8458.html
- https://curl.se/docs/CVE-2026-8458.json
- https://hackerone.com/reports/3721183