CVE-2026-7598

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.

CVSS v3.1 Score

7.3

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS — Exploit Prediction

0.0007

Probability of exploitation

0.21%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-189 CWE-189

CWE-190 Integer Overflow

Affected Products

Vendor	Product	Versions
libssh2	libssh2	< 1.11.1

References

Advisories & Patches

https://github.com/libssh2/libssh2/commit/256d04b60d80bf1190e96b0ad1e91b2174d744b1

Other References

https://github.com/libssh2/libssh2/ https://github.com/libssh2/libssh2/pull/1858 https://vuldb.com/submit/805564 https://vuldb.com/vuln/360555 https://vuldb.com/vuln/360555/cti https://vuldb.com/submit/805564

Frequently Asked Questions

What is CVE-2026-7598? +

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. It has a CVSS v3.1 base score of 7.3 (HIGH).

How severe is CVE-2026-7598? +

CVE-2026-7598 has a CVSS v3.1 score of 7.3 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0007, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-7598? +

CVE-2026-7598 affects products from libssh2, specifically: libssh2. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-7598? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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