CVE-2026-7598: Integer Overflow in libssh2
CVE-2026-7598 is an integer overflow vulnerability in libssh2 versions up to 1. 11. 1, specifically in the userauth_password function within src/userauth. c. The vulnerability arises from manipulation of the username_len or password_len arguments, potentially leading to an integer overflow. This flaw can be exploited remotely without authentication. A patch identified by commit 256d04b60d80bf1190e96b0ad1e91b2174d744b1 has been created to address this issue. The vulnerability has a CVSS 4. 0 base score of 6. 9, indicating a medium severity level.
AI Analysis
Technical Summary
The vulnerability CVE-2026-7598 affects libssh2 versions 1.11.0 and 1.11.1 in the userauth_password function of src/userauth.c. Improper handling of the username_len and password_len parameters can cause an integer overflow, which may be triggered remotely without requiring privileges or user interaction. This could potentially lead to unexpected behavior or memory corruption. A patch has been developed (commit 256d04b60d80bf1190e96b0ad1e91b2174d744b1) to fix the issue, but no official remediation level or vendor advisory is provided in the data. The CVSS 4.0 score is 6.9, reflecting a medium severity vulnerability with network attack vector and low complexity.
Potential Impact
The integer overflow vulnerability allows remote attackers to manipulate input parameters to cause an overflow condition in libssh2's user authentication process. This may lead to memory corruption or other unintended behavior, potentially impacting the confidentiality, integrity, or availability of the affected system. However, no known exploits are currently reported in the wild, and the overall severity is medium.
Mitigation Recommendations
A patch identified by commit 256d04b60d80bf1190e96b0ad1e91b2174d744b1 exists and should be applied to affected libssh2 versions (1.11.0 and 1.11.1) to remediate this vulnerability. Patch status is not explicitly confirmed in a vendor advisory; therefore, users should verify the availability and applicability of this patch from the official libssh2 source or repository. Until patched, caution is advised when exposing vulnerable versions to untrusted networks.
CVE-2026-7598: Integer Overflow in libssh2
Description
CVE-2026-7598 is an integer overflow vulnerability in libssh2 versions up to 1. 11. 1, specifically in the userauth_password function within src/userauth. c. The vulnerability arises from manipulation of the username_len or password_len arguments, potentially leading to an integer overflow. This flaw can be exploited remotely without authentication. A patch identified by commit 256d04b60d80bf1190e96b0ad1e91b2174d744b1 has been created to address this issue. The vulnerability has a CVSS 4. 0 base score of 6. 9, indicating a medium severity level.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-7598 affects libssh2 versions 1.11.0 and 1.11.1 in the userauth_password function of src/userauth.c. Improper handling of the username_len and password_len parameters can cause an integer overflow, which may be triggered remotely without requiring privileges or user interaction. This could potentially lead to unexpected behavior or memory corruption. A patch has been developed (commit 256d04b60d80bf1190e96b0ad1e91b2174d744b1) to fix the issue, but no official remediation level or vendor advisory is provided in the data. The CVSS 4.0 score is 6.9, reflecting a medium severity vulnerability with network attack vector and low complexity.
Potential Impact
The integer overflow vulnerability allows remote attackers to manipulate input parameters to cause an overflow condition in libssh2's user authentication process. This may lead to memory corruption or other unintended behavior, potentially impacting the confidentiality, integrity, or availability of the affected system. However, no known exploits are currently reported in the wild, and the overall severity is medium.
Mitigation Recommendations
A patch identified by commit 256d04b60d80bf1190e96b0ad1e91b2174d744b1 exists and should be applied to affected libssh2 versions (1.11.0 and 1.11.1) to remediate this vulnerability. Patch status is not explicitly confirmed in a vendor advisory; therefore, users should verify the availability and applicability of this patch from the official libssh2 source or repository. Until patched, caution is advised when exposing vulnerable versions to untrusted networks.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-05-01T10:45:11.583Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f51cd7cbff5d861061b000
Added to database: 5/1/2026, 9:36:23 PM
Last enriched: 5/1/2026, 9:51:19 PM
Last updated: 5/1/2026, 10:42:37 PM
Views: 4
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