Vulnerability in Ncopa Su-Exec
CVE-2026-82457
su-exec through 0.3 fails to validate numeric user and group identifiers parsed with strtol before assigning to uid_t and gid_t, allowing truncation of out-of-range values to zero. Attackers can supply large numeric identifiers that truncate to root's identifier, causing su-exec to execute target programs with root privileges instead of intended unprivileged accounts.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (technical-description)
- disclosure@vulncheck.com (third-party-advisory)
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-82457?
- CVE-2026-82457 is a high-severity vulnerability in Ncopa Su-Exec, classified under Incorrect Conversion between Numeric Types. CVSS score: 7.8/10. Published 2026-08-29.
- How severe is CVE-2026-82457?
- High severity. CVSS v3 base score is 7.8 out of 10.