CVE-2026-7598
libssh2 userauth.c userauth_password integer overflow
- State
- Published
- Severity
- 6.9 Medium
- Published
- May 1, 2026
- Updated
- Sep 1, 2026
- Reserved
- May 1, 2026
Description
A security vulnerability has been detected in libssh2 up to 1.11.1. The impacted element is the function userauth_password of the file src/userauth.c. Such manipulation of the argument username_len/password_len leads to integer overflow. The attack may be launched remotely. The name of the patch is 256d04b60d80bf1190e96b0ad1e91b2174d744b1. A patch should be applied to remediate this issue.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X | VulDB |
| 3.1 | 7.3 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C | VulDB |
| 3.0 | 7.3 High | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C | VulDB |
| 2.0 | 7.5 High | AV:N/AC:L/Au:N/C:P/I:P/A:P/E:ND/RL:OF/RC:C | VulDB |
| 3.1 | 9.1 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H | redhat-SADP |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
libssh2n/a |
|
References
- VDB-360555 | libssh2 userauth.c userauth_password integer overflowvdb-entrytechnical-description
- VDB-360555 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- Submit #805564 | libssh2 <= 1.11.1 Integer Overflowthird-party-advisory
- https://github.com/libssh2/libssh2/pull/1858issue-trackingpatch
- https://github.com/libssh2/libssh2/commit/256d04b60d80bf1190e96b0ad1e91b2174d744b1patch
- https://github.com/libssh2/libssh2/product
- https://access.redhat.com/security/cve/CVE-2026-7598vdb-entry
- RHBZ#2464597issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7598.json
- https://access.redhat.com/errata/RHSA-2026:61752vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:7021vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:16736vendor-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.