TI-2026-56853 Aliases CVE-2026-82457 GHSA-qpg9-jg2w-m84x

su-exec through 0.3 Privilege Escalation via Numeric User ID

HIGH 72CWE-681Published 2026-08-29 · Updated 2026-09-24

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00175 7th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
ncopa	su-exec	up to 0.3	—	No fix listed	CNA

su-exec Vendorncopa Affected up to 0.3 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-82457
2026-10-03 Alias added: GHSA-qpg9-jg2w-m84x

References

Advisory 1

Reporter's write-up

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences