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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.

PUBLISHED Reserved 2026-05-01 | Published 2026-05-01 | Updated 2026-05-01 | Assigner VulDB




MEDIUM: 6.9CVSS: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
HIGH: 7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C
HIGH: 7.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C
7.5AV:N/AC:L/Au:N/C:P/I:P/A:P/E:ND/RL:OF/RC:C

Problem types

Integer Overflow

Numeric Error

Timeline

2026-05-01:Advisory disclosed
2026-05-01:VulDB entry created
2026-05-01:VulDB entry last update

Credits

dapickle (VulDB User) reporter

References

vuldb.com/vuln/360555 (VDB-360555 | libssh2 userauth.c userauth_password integer overflow) vdb-entry technical-description

vuldb.com/vuln/360555/cti (VDB-360555 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/submit/805564 (Submit #805564 | libssh2 <= 1.11.1 Integer Overflow) third-party-advisory

github.com/libssh2/libssh2/pull/1858 issue-tracking patch

github.com/...ommit/256d04b60d80bf1190e96b0ad1e91b2174d744b1 patch

github.com/libssh2/libssh2/ product

cve.org (CVE-2026-7598)

nvd.nist.gov (CVE-2026-7598)

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