CVE-2026-7598
libssh2 userauth.c userauth_password integer overflow
Reported by vuldb · Published May 1, 2026
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.
EPSS 0.47% · 40.3th percentile
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| cargo-c | Amazon Linux | 0.10.19-1.amzn2023.0.3 |
| libssh2-docs | Amazon Linux | 1.4.3-12.amzn2.2.7 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | libssh2 | 1.11.0, 1.11.1 |
| n/a | libssh2 | 1.11.0, 1.11.1 |
Timeline
- May 1, 2026 CVE Published
- May 2, 2026 EPSS Score (30 in total, the first dated here)
- Jun 2, 2026 Security Advisory (7 in total, the first dated here)
- Jul 28, 2026 Coalition ESS Score
- Aug 11, 2026 Distribution Patch (5 in total, the first dated here)
- Sep 1, 2026 CVE Updated
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References
- VDB-360555 | libssh2 userauth.c userauth_password integer overflow vdb-entrytechnical-description
- VDB-360555 | CTI Indicators (IOB, IOC, IOA) signaturepermissions-required
- Submit #805564 | libssh2 <= 1.11.1 Integer Overflow third-party-advisory
- issue-trackingpatch
- patch
- product