CVE-2026-16987

HIGHNVD 7.88.8▲
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-13. NVD baseline CVSS 7.8; sources differ by 1.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
8.8EG
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: None knownExposed: 0

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

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local attacker to gain elevated privileges due to improper validation of the LANG environment variable.

CVSS v3
7.8
EG Score
8.8(medium)
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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

August 13, 2026

Last Modified

August 17, 2026

Advisory Details (1)

Auto-updated Aug 13, 2026
No patch confirmed yet.
generic

Security Bulletin: IBM i is Affected By An Improper Validation Vulnerability in PASE [CVE-2026-16987]

https://www.ibm.com/support/pages/node/7283296

Vendor Advisories for CVE-2026-16987(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 23× in last 7d / 100× 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.

Showing the most recent 100 of 135 total refreshes for this CVE.

  1. 2026-09-19 16:17 UTCGHSA enrichment
  2. 2026-09-19 03:09 UTCEG score recompute
  3. 2026-09-19 03:09 UTCGHSA enrichment
  4. 2026-09-18 19:27 UTCEPSS rescore
  5. 2026-09-18 14:32 UTCGHSA enrichment
  6. 2026-09-18 01:55 UTCEG score recompute
  7. 2026-09-18 01:55 UTCGHSA enrichment
  8. 2026-09-17 13:18 UTCGHSA enrichment
  9. 2026-09-16 23:56 UTCEG score recompute
  10. 2026-09-16 23:56 UTCGHSA enrichment
  11. 2026-09-16 14:07 UTCEPSS rescore
  12. 2026-09-16 05:14 UTCEPSS rescore
  13. 2026-09-16 01:41 UTCGHSA enrichment
  14. 2026-09-15 13:04 UTCEG score recompute
  15. 2026-09-15 13:04 UTCGHSA enrichment
  16. 2026-09-15 00:20 UTCGHSA enrichment
  17. 2026-09-14 11:27 UTCGHSA enrichment
  18. 2026-09-13 22:49 UTCEG score recompute
  19. 2026-09-13 22:49 UTCGHSA enrichment
  20. 2026-09-13 16:46 UTCEPSS rescore
  21. 2026-09-13 10:12 UTCGHSA enrichment
  22. 2026-09-12 21:35 UTCEG score recompute
  23. 2026-09-12 21:35 UTCGHSA enrichment
  24. 2026-09-12 15:00 UTCEPSS rescore
  25. 2026-09-12 08:58 UTCGHSA enrichment
Show 75 more
  1. 2026-09-11 20:21 UTCEG score recompute
  2. 2026-09-11 20:21 UTCGHSA enrichment
  3. 2026-09-11 14:52 UTCEPSS rescore
  4. 2026-09-11 09:36 UTCEPSS rescore
  5. 2026-09-11 07:34 UTCGHSA enrichment
  6. 2026-09-10 18:57 UTCEG score recompute
  7. 2026-09-10 18:57 UTCGHSA enrichment
  8. 2026-09-10 09:34 UTCEPSS rescore
  9. 2026-09-10 06:20 UTCGHSA enrichment
  10. 2026-09-09 17:42 UTCGHSA enrichment
  11. 2026-09-09 04:52 UTCEG score recompute
  12. 2026-09-09 04:52 UTCGHSA enrichment
  13. 2026-09-08 22:00 UTCEPSS rescore
  14. 2026-09-08 06:15 UTCGHSA enrichment
  15. 2026-09-07 16:29 UTCGHSA enrichment
  16. 2026-09-06 21:57 UTCEG score recompute
  17. 2026-09-06 21:57 UTCGHSA enrichment
  18. 2026-09-06 13:47 UTCEPSS rescore
  19. 2026-09-06 09:19 UTCGHSA enrichment
  20. 2026-09-05 20:29 UTCEG score recompute
  21. 2026-09-05 20:29 UTCGHSA enrichment
  22. 2026-09-05 07:52 UTCGHSA enrichment
  23. 2026-09-04 19:15 UTCEG score recompute
  24. 2026-09-04 19:15 UTCGHSA enrichment
  25. 2026-09-04 06:12 UTCEG score recompute
  26. 2026-09-04 06:12 UTCGHSA enrichment
  27. 2026-09-04 05:06 UTCEPSS rescore
  28. 2026-09-03 16:11 UTCGHSA enrichment
  29. 2026-09-03 01:57 UTCGHSA enrichment
  30. 2026-09-02 13:20 UTCGHSA enrichment
  31. 2026-09-02 00:29 UTCEG score recompute
  32. 2026-09-02 00:29 UTCGHSA enrichment
  33. 2026-09-01 13:53 UTCEPSS rescore
  34. 2026-09-01 11:38 UTCEG score recompute
  35. 2026-09-01 11:37 UTCGHSA enrichment
  36. 2026-09-01 04:39 UTCEPSS rescore
  37. 2026-08-31 22:59 UTCGHSA enrichment
  38. 2026-08-31 10:21 UTCGHSA enrichment
  39. 2026-08-30 21:41 UTCEG score recompute
  40. 2026-08-30 21:41 UTCGHSA enrichment
  41. 2026-08-30 19:17 UTCEPSS rescore
  42. 2026-08-30 09:04 UTCEG score recompute
  43. 2026-08-30 09:03 UTCGHSA enrichment
  44. 2026-08-30 01:22 UTCEPSS rescore
  45. 2026-08-29 20:23 UTCGHSA enrichment
  46. 2026-08-29 07:12 UTCEG score recompute
  47. 2026-08-29 07:12 UTCGHSA enrichment
  48. 2026-08-28 21:41 UTCEPSS rescore
  49. 2026-08-28 04:53 UTCGHSA enrichment
  50. 2026-08-27 16:16 UTCEG score recompute
  51. 2026-08-27 16:15 UTCGHSA enrichment
  52. 2026-08-27 14:25 UTCEPSS rescore
  53. 2026-08-27 03:14 UTCEG score recompute
  54. 2026-08-27 03:14 UTCGHSA enrichment
  55. 2026-08-26 14:46 UTCEPSS rescore
  56. 2026-08-26 14:37 UTCGHSA enrichment
  57. 2026-08-26 01:55 UTCEG score recompute
  58. 2026-08-26 01:55 UTCGHSA enrichment
  59. 2026-08-25 13:48 UTCEPSS rescore
  60. 2026-08-25 13:18 UTCGHSA enrichment
  61. 2026-08-25 00:40 UTCEG score recompute
  62. 2026-08-25 00:40 UTCGHSA enrichment
  63. 2026-08-24 12:02 UTCEG score recompute
  64. 2026-08-24 12:02 UTCGHSA enrichment
  65. 2026-08-23 23:24 UTCGHSA enrichment
  66. 2026-08-23 10:47 UTCEG score recompute
  67. 2026-08-23 10:47 UTCGHSA enrichment
  68. 2026-08-23 00:19 UTCEPSS rescore
  69. 2026-08-22 22:10 UTCGHSA enrichment
  70. 2026-08-22 09:33 UTCGHSA enrichment
  71. 2026-08-21 20:56 UTCGHSA enrichment
  72. 2026-08-21 08:19 UTCEG score recompute
  73. 2026-08-21 08:19 UTCGHSA enrichment
  74. 2026-08-20 22:55 UTCEPSS rescore
  75. 2026-08-20 19:41 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-16987?
CVE-2026-16987 is a high vulnerability published on August 13, 2026. IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local attacker to gain elevated privileges due to improper validation of the LANG environment variable.
When was CVE-2026-16987 disclosed?
CVE-2026-16987 was first published in the National Vulnerability Database on August 13, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16987 actively exploited?
CVE-2026-16987 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 98.4% of all scored CVEs.
What is the CVSS score of CVE-2026-16987?
CVE-2026-16987 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.8.
How do I remediate CVE-2026-16987?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16987, 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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