# CVE-2026-82457

## Summary

- **CVE ID:** CVE-2026-82457
- **Severity:** HIGH
- **CVSS Score:** 8.5 (CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-681
- **Published:** Aug 29, 2026
- **Last Modified:** Sep 1, 2026

## Description

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.

## Affected Products

- ncopa — su-exec (0)

## References

- [CNA](https://github.com/ncopa/su-exec/blob/89c016e6e08749d583efdeda04b9f73e1218e253/su-exec.c)
- [CNA](https://gist.github.com/thesmartshadow/ed96e2a88643c34a247c9b7cf9e311be)
- [CNA](https://github.com/ncopa/su-exec)
- [CNA](https://www.vulncheck.com/advisories/su-exec-through-0.3-privilege-escalation-via-numeric-user-id)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.12%
- **EPSS Percentile:** 2.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._