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: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: Elevated riskExposed: 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
51(Track*)
EG Risk 51/100SSVC: 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%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

August 29, 2026

Last Modified

September 1, 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 24× in last 7d / 82× 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. 2026-09-19 05:31 UTCEG score recompute
  2. 2026-09-19 05:31 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 18:37 UTCGHSA enrichment
  5. 2026-09-18 07:42 UTCGHSA enrichment
  6. 2026-09-17 20:50 UTCGHSA enrichment
  7. 2026-09-17 07:00 UTCGHSA enrichment
  8. 2026-09-16 20:08 UTCEG score recompute
  9. 2026-09-16 20:08 UTCGHSA enrichment
  10. 2026-09-16 14:08 UTCEPSS rescore
  11. 2026-09-16 09:16 UTCGHSA enrichment
  12. 2026-09-15 22:23 UTCGHSA enrichment
  13. 2026-09-15 11:27 UTCEG score recompute
  14. 2026-09-15 11:27 UTCGHSA enrichment
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-15 00:35 UTCGHSA enrichment
  18. 2026-09-14 13:43 UTCGHSA enrichment
  19. 2026-09-14 02:43 UTCEG score recompute
  20. 2026-09-14 02:43 UTCGHSA enrichment
  21. 2026-09-13 15:50 UTCGHSA enrichment
  22. 2026-09-13 04:58 UTCGHSA enrichment
  23. 2026-09-12 18:06 UTCEG score recompute
  24. 2026-09-12 18:06 UTCGHSA enrichment
  25. 2026-09-12 07:13 UTCGHSA enrichment
Show 57 more
  1. 2026-09-11 20:21 UTCEG score recompute
  2. 2026-09-11 20:21 UTCGHSA enrichment
  3. 2026-09-11 14:53 UTCEPSS rescore
  4. 2026-09-11 14:53 UTCEPSS rescore
  5. 2026-09-11 09:29 UTCGHSA enrichment
  6. 2026-09-10 22:37 UTCGHSA enrichment
  7. 2026-09-10 11:45 UTCEG score recompute
  8. 2026-09-10 11:45 UTCGHSA enrichment
  9. 2026-09-09 23:51 UTCGHSA enrichment
  10. 2026-09-09 11:16 UTCGHSA enrichment
  11. 2026-09-09 00:24 UTCEG score recompute
  12. 2026-09-09 00:24 UTCGHSA enrichment
  13. 2026-09-08 22:01 UTCEPSS rescore
  14. 2026-09-08 10:20 UTCGHSA enrichment
  15. 2026-09-07 22:56 UTCEG score recompute
  16. 2026-09-07 22:56 UTCGHSA enrichment
  17. 2026-09-07 12:03 UTCGHSA enrichment
  18. 2026-09-07 01:05 UTCGHSA enrichment
  19. 2026-09-06 14:11 UTCEG score recompute
  20. 2026-09-06 14:11 UTCGHSA enrichment
  21. 2026-09-06 13:48 UTCEPSS rescore
  22. 2026-09-06 03:19 UTCGHSA enrichment
  23. 2026-09-05 16:26 UTCGHSA enrichment
  24. 2026-09-05 05:35 UTCGHSA enrichment
  25. 2026-09-04 18:43 UTCEG score recompute
  26. 2026-09-04 18:43 UTCGHSA enrichment
  27. 2026-09-04 07:48 UTCEG score recompute
  28. 2026-09-04 07:48 UTCGHSA enrichment
  29. 2026-09-04 05:07 UTCEPSS rescore
  30. 2026-09-03 20:56 UTCGHSA enrichment
  31. 2026-09-03 10:01 UTCGHSA enrichment
  32. 2026-09-02 23:06 UTCEG score recompute
  33. 2026-09-02 23:05 UTCGHSA enrichment
  34. 2026-09-02 14:12 UTCEPSS rescore
  35. 2026-09-02 12:12 UTCGHSA enrichment
  36. 2026-09-02 01:17 UTCGHSA enrichment
  37. 2026-09-01 14:22 UTCEG score recompute
  38. 2026-09-01 14:22 UTCGHSA enrichment
  39. 2026-09-01 13:54 UTCEPSS rescore
  40. 2026-09-01 04:40 UTCEPSS rescore
  41. 2026-09-01 04:40 UTCEPSS rescore
  42. 2026-09-01 03:29 UTCEG score recompute
  43. 2026-09-01 03:29 UTCGHSA enrichment
  44. 2026-09-01 02:41 UTCEG score recompute
  45. 2026-09-01 02:40 UTCGHSA enrichment
  46. 2026-08-31 20:48 UTCGHSA enrichment
  47. 2026-08-31 09:52 UTCGHSA enrichment
  48. 2026-08-30 23:00 UTCEG score recompute
  49. 2026-08-30 23:00 UTCGHSA enrichment
  50. 2026-08-30 19:18 UTCEPSS rescore
  51. 2026-08-30 19:17 UTCEPSS rescore
  52. 2026-08-30 12:08 UTCGHSA enrichment
  53. 2026-08-30 01:16 UTCEG score recompute
  54. 2026-08-30 01:15 UTCGHSA enrichment
  55. 2026-08-29 14:22 UTCEG score recompute
  56. 2026-08-29 13:53 UTCEG score recompute
  57. 2026-08-29 13:52 UTCMITRE cvelistV5first tracked

Frequently asked(5)

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, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82457 actively exploited?
CVE-2026-82457 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 97.9% of all scored CVEs.
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

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