CVE-2026-58517

MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-07-01. NVD baseline CVSS 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

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

Improper neutralization of input terminators vulnerability in The Wikimedia Foundation Mediawiki - WikiLambda Extension allows Authentication Bypass.

This issue affects Mediawiki - WikiLambda Extension: from * before 1.43.9,1.44.6,1.45.4.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: 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
Severity43% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

July 1, 2026

Last Modified

July 10, 2026

Advisory Details (2)

Auto-updated Jul 1, 2026
No patch confirmed yet.
generic

⚓ T428833 CVE-2026-58517: Blocked users can create and edit WikiLambda objects

https://phabricator.wikimedia.org/T428833
generic
https://gerrit.wikimedia.org/r/c/1305376

Vendor Advisories for CVE-2026-58517(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 7× in last 7d / 53× 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 161 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-58517?
CVE-2026-58517 is a medium vulnerability published on July 1, 2026. Improper neutralization of input terminators vulnerability in The Wikimedia Foundation Mediawiki - WikiLambda Extension allows Authentication Bypass. This issue affects Mediawiki - WikiLambda Extension: from * before 1.43.9,1.44.6,1.45.4.
When was CVE-2026-58517 disclosed?
CVE-2026-58517 was first published in the National Vulnerability Database on July 1, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58517 actively exploited?
CVE-2026-58517 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 74.2% of all scored CVEs.
What is the CVSS score of CVE-2026-58517?
CVE-2026-58517 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-58517?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58517, 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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