Vulnerability Report

CVE-2026-3805

Title: curl SMB Use-After-Free

Memory Corruption

Proof Of Concept

PoC Available for CVE-2026-3805

CWE Category NVD-CWE-noinfo
Published Date Mar 11, 2026
Modified Date Mar 12, 2026
Exploit Status Available
Score 7.5 CVSS v
Exploit Probability (EPSS)
0.03%

Vulnerability Summary

CVE-2026-3805: When doing a second SMB request to the same host again, curl would wrongly use a data pointer pointing into already freed memory.

Impacted Vendors

D
daniel_stenberg 1
H
haxx 1

Reference Links

https://curl.se/docs/CVE-2026-3805.html https://curl.se/docs/CVE-2026-3805.json https://hackerone.com/reports/3591944 http://www.openwall.com/lists/oss-security/2026/03/11/4
CVSS v3.1
Source Entity 134c704f-9b21-4f2e-91b3-4a467353bcc0
Severity HIGH
7.5
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-3805 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/Rat5ak/CVE-2026-3805-curl-SMB-UAF
View Code
MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Stack

No specific products linked.