CVEvulnerability
CVE-2026-5773
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2026-05-13
- Last modified
- 2026-09-15
- Assigner
- 2499f714-1537-4658-8207-48ae4bb9eae9
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weaknesses
- CWE-488, CWE-918
Description
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.
Affected configurations
• haxx curl (>= 7.40.0 < 8.20.0)
Related
References
- https://curl.se/docs/CVE-2026-5773.html Patch, Vendor Advisory
- https://curl.se/docs/CVE-2026-5773.json Vendor Advisory
- https://hackerone.com/reports/3650689 Exploit, Issue Tracking, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2026/04/29/9 Mailing List, Patch, Third Party Advisory
- https://hackerone.com/reports/3650689 Exploit, Issue Tracking, Third Party Advisory