CVE-2026-8458

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.

• curl.sehttps://curl.se/docs/CVE-2026-8458.html
• curl.sehttps://curl.se/docs/CVE-2026-8458.json
• hackerone.comhttps://hackerone.com/reports/3721183
• hackerone.comhttps://hackerone.com/reports/3721183

No related CVEs by CWE or product.