CVE-2026-75827

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-18. A secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Elevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.9%CVSS: 8.8Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Grav before 2.0.15 contains an arbitrary file write vulnerability in the Blueprint dynamic-data bare-function validation that uses an incomplete denylist instead of a positive allowlist. Attackers with page-edit or blueprint-config access can invoke the error_log function through a data directive to append PHP payloads to web-accessible files, achieving remote code execution.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
56
EG Risk 56/100CISA SSVC

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%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.9%
EPSS %ILE
57th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 18, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Aug 18, 2026
Patch available. Sources: github.
generic

Grav before 2.0.15 Arbitrary File Write via error_log | Advisories | VulnCheck

https://www.vulncheck.com/advisories/grav-before-arbitrary-file-write-via-error-log
github Patch Available

Blueprint dynamic-data bare-function branch is denylist-gated and omits error_log, giving arbitrary file write · Advisory · getgrav/grav · GitHub

https://github.com/getgrav/grav/security/advisories/GHSA-f8wv-xp27-6gq7

Vendor Advisories for CVE-2026-75827(1)

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

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
getgrav/grav0.8.0 ... 2.0.9 (349 versions)
  • every version up to 2.0.15: fixed in 2.0.15
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 71× 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 146 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-75827?
CVE-2026-75827 is a high vulnerability published on August 18, 2026. Grav before 2.0.15 contains an arbitrary file write vulnerability in the Blueprint dynamic-data bare-function validation that uses an incomplete denylist instead of a positive allowlist. Attackers with page-edit or blueprint-config access can invoke the error_log function through a data directive…
When was CVE-2026-75827 disclosed?
CVE-2026-75827 was first published on August 18, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-75827 actively exploited?
CVE-2026-75827 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.9% probability of exploitation in the next 30 days (57th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-75827?
CVE-2026-75827 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-75827?
A fix for CVE-2026-75827 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-75827 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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