CVE-2026-57852

MEDIUMPre-NVD 5.65.6—
EchelonGraph scoreMEDIUM confidence

Score 5.6 from GitHub Security Advisory published 2026-07-21. a secondary CVSS source baseline 5.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.6EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 5.6Exploit: None knownExposed: 0

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

Grav CMS scheduler-webhook plugin contains an authentication bypass vulnerability that allows unauthenticated remote attackers to trigger configured scheduled jobs by exploiting a short-circuit logic flaw in the webhook token validation. Attackers can send a single unauthenticated POST request to the scheduler webhook endpoint to execute all configured scheduled jobs or target a specific job, causing unintended execution of operator-defined commands under the web server process user.

CVSS v3
5.6
EG Score
5.6(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity56% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
51%
KEV
Not listed

Published

July 20, 2026

Last Modified

July 21, 2026

Advisory Details (3)

Auto-updated Jul 20, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Authentication Bypass via Null Short-Circuit in Grav CMS Scheduler Webhook Token Check | Advisories | VulnCheck

https://www.vulncheck.com/advisories/authentication-bypass-via-null-short-circuit-in-grav-cms-scheduler-webhook-token-check
github Patch Available🟡 PoC Available

Coordinated Vulnerability Disclosure - Trilby Media / Grav CMS · Advisory · getgrav/grav · GitHub

https://github.com/getgrav/grav/security/advisories/GHSA-xwv3-2mv2-w33x
generic

GitHub - getgrav/grav: Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS powered by PHP, Markdown, Twig, and Symfony · GitHub

https://github.com/getgrav/grav

Vendor Advisories for CVE-2026-57852(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 15× in last 7d / 70× 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 139 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-57852?
CVE-2026-57852 is a medium vulnerability published on July 20, 2026. Grav CMS scheduler-webhook plugin contains an authentication bypass vulnerability that allows unauthenticated remote attackers to trigger configured scheduled jobs by exploiting a short-circuit logic flaw in the webhook token validation. Attackers can send a single unauthenticated POST request to…
When was CVE-2026-57852 disclosed?
CVE-2026-57852 was first published in the National Vulnerability Database on July 20, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57852 actively exploited?
CVE-2026-57852 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 49.4% of all scored CVEs.
What is the CVSS score of CVE-2026-57852?
CVE-2026-57852 has a CVSS v3 base score of 5.6 (NVD).
How do I remediate CVE-2026-57852?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57852, 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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