CVE-2026-3805
use after free in SMB connection reuse
HIGH 7.5EPSS 1.0%
When doing a second SMB request to the same host again, curl would wrongly use a data pointer pointing into already freed memory.
- Affected
- curl
- CVSS v3.1 CNA
- 7.5 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS
- 0.99% chance of exploitation in the next 30 days, 62nd percentile
- Published
- 2026-03-11
- Updated
- 2026-09-15
Proof-of-concept exploits (1)
- Rat5ak/CVE-2026-3805-curl-SMB-UAF0★ · 2026-07-13
Security advisories
- https://curl.se/docs/CVE-2026-3805.html
- https://curl.se/docs/CVE-2026-3805.json
- http://www.openwall.com/lists/oss-security/2026/03/11/4
- https://hackerone.com/reports/3591944