CVE-2026-75831

HIGHPre-NVD 7.67.6—
EchelonGraph scoreMEDIUM confidence

Score 7.6 from GitHub Security Advisory published 2026-08-18. A secondary CVSS source baseline 7.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Elevated
7.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.6Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Grav before 2.0.15 contains a stored cross-site scripting vulnerability in the audio and video media rendering through the sourceParsedownElement method. The media URL fragment is concatenated unescaped into rawHtml source elements, allowing attackers to inject arbitrary HTML and JavaScript that executes in viewers' sessions.

CVSS v3
7.6
EG Score
7.6HIGHmedium confidence
EG Risk
50
EG Risk 50/100CISA 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
Severity76% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
26th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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 (3)

Auto-updated Aug 18, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
generic

Grav before 2.0.15 Stored XSS via audio/video source URL | Advisories | VulnCheck

https://www.vulncheck.com/advisories/grav-before-stored-xss-via-audio-video-source-url
github_commit Patch Available

commit aba291a59cab (getgrav/grav)

Patch available: getgrav/grav 2.0.0-rc.10 (contains commit aba291a59cab)

https://github.com/getgrav/grav/commit/aba291a59cab29ddce491175791888d8d0b65e20
github Patch Available🟡 PoC Available

Stored XSS via Markdown audio/video media <source> URL · Advisory · getgrav/grav · GitHub

https://github.com/getgrav/grav/security/advisories/GHSA-6qw9-4vv5-jr97

Vendor Advisories for CVE-2026-75831(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 12× in last 7d / 75× 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 154 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-75831?
CVE-2026-75831 is a high vulnerability published on August 18, 2026. Grav before 2.0.15 contains a stored cross-site scripting vulnerability in the audio and video media rendering through the sourceParsedownElement method. The media URL fragment is concatenated unescaped into rawHtml source elements, allowing attackers to inject arbitrary HTML and JavaScript that…
When was CVE-2026-75831 disclosed?
CVE-2026-75831 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-2026-75831 actively exploited?
CVE-2026-75831 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (26th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-75831?
CVE-2026-75831 has a CVSS base score of 7.6 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-75831?
A fix for CVE-2026-75831 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-75831 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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