CVE-2026-82457

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-29. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 7.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
7.8
EG Score
7.8(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
—
EPSS %ILE
—
KEV
Not listed

Published

August 29, 2026

Last Modified

August 29, 2026

Advisory Details (4)

Auto-updated Aug 29, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

su-exec through 0.3 Privilege Escalation via Numeric User ID | Advisories | VulnCheck

https://www.vulncheck.com/advisories/su-exec-through-0.3-privilege-escalation-via-numeric-user-id
generic

GitHub - ncopa/su-exec: switch user and group id and exec · GitHub

https://github.com/ncopa/su-exec
generic🟡 PoC Available

su-exec privilege-drop bypass via unchecked numeric UID/GID conversion · GitHub

https://gist.github.com/thesmartshadow/ed96e2a88643c34a247c9b7cf9e311be
generic

su-exec/su-exec.c at 89c016e6e08749d583efdeda04b9f73e1218e253 · ncopa/su-exec · GitHub

https://github.com/ncopa/su-exec/blob/89c016e6e08749d583efdeda04b9f73e1218e253/su-exec.c

Vendor Advisories for CVE-2026-82457(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 5× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-30 01:16 UTCEG score recompute
  2. 2026-08-30 01:15 UTCGHSA enrichment
  3. 2026-08-29 14:22 UTCEG score recompute
  4. 2026-08-29 13:53 UTCEG score recompute
  5. 2026-08-29 13:52 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-82457?
CVE-2026-82457 is a high vulnerability published on August 29, 2026. su-exec through 0.3 fails to validate numeric user and group identifiers parsed with strtol before assigning to uidt and gidt, 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…
When was CVE-2026-82457 disclosed?
CVE-2026-82457 was first published in the National Vulnerability Database on August 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-82457?
CVE-2026-82457 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-82457?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-82457, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-82457

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