Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N L N N U H N N 7.5 .0066 49.7 —
AFFECTED Product Versions Fixed curl 7.40.0 – — curl aec2e865f06669b9cb5d26cc1148d70bc418b163 – — curl 8.19.0 – —
TIMELINE Apr 8 Reserved by curl May 13 Published (CNA: curl) Sep 15 EXPLOIT PUBLISHED — CVE-2026-5773 (curl). Public exploit reference added.
libcurl might in some circumstances reuse the wrong connection for SMB(S) transfers. 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 network transfer operation that was requested by an application could wrongfully reuse an existing SMB connection to the same server that was using a different "share" than the new subsequent transfer should. This could in unlucky situations lead to the download of the wrong file or the upload of a file to the wrong place. When this happens, the same credentials are used and the server name is the same.
| Date | Event | Detail |
|---|---|---|
| April 8, 2026 | Reserved | Reserved by curl |
| May 13, 2026 | Published | Published (CNA: curl) |
| September 15, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-5773 (curl). Public exploit reference added. |
Authoritative record: CVE-2026-5773 at cve.org
Vendors: curl
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-5773 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
