CVE-2026-58657

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreMEDIUM confidence

Score 4.8 from GitHub Security Advisory published 2026-07-08. a secondary CVSS source baseline 4.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
4.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.8Exploit: Elevated riskExposed: 0

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

Grav before 2.0.0 (affected through 2.0.0-rc.9 and the 2.0 branch) contains a stored CSS injection vulnerability in the Markdown image resize() media action. Prior media hardening rejects direct ?style= payloads and unsafe attribute() fallbacks, but the resize() action in Excerpts::processMediaActions() writes caller-controlled values directly into the image's styleAttributes. A lower-privileged content editor who can edit page Markdown can store a crafted image URL with semicolon-delimited CSS declarations in the resize parameters, which are rendered into the final attribute when a higher-privileged reviewer/admin views the page or preview. This does not require JavaScript execution but enables UI redress/overlay and content-manipulation attacks (e.g., a full-viewport fixed overlay). Fixed in 2.0.0.

CVSS v3
4.8
EG Score
4.8(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity48% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
30%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 8, 2026

Advisory Details (4)

Auto-updated Jul 9, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available

Stored CSS injection via Markdown image resize() bypasses prior media style sanitizers in Grav 2.0 · Advisory · getgrav/grav · GitHub

https://github.com/getgrav/grav/security/advisories/GHSA-ffmg-hfvg-jhg9
generic

Grav - Stored CSS Injection via Markdown Image resize() Action | Advisories | VulnCheck

https://www.vulncheck.com/advisories/grav-stored-css-injection-via-markdown-image-resize-action
github_commit Patch Available

commit e03d29aa0d3e (getgrav/grav)

Patch available: getgrav/grav 2.0.0-rc.9 (contains commit e03d29aa0d3e)

https://github.com/getgrav/grav/commit/e03d29aa0d3ece16d73c1ffccfa78df8bf5f28b8
github_commit Patch Available

commit 6582166173bb (getgrav/grav)

Patch available: getgrav/grav 2.0.0-rc.10 (contains commit 6582166173bb)

https://github.com/getgrav/grav/commit/6582166173bb8eb5869d96aea384e0e73777c94c

Vendor Advisories for CVE-2026-58657(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 14× in last 7d / 77× 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 131 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-58657?
CVE-2026-58657 is a medium vulnerability published on July 8, 2026. Grav before 2.0.0 (affected through 2.0.0-rc.9 and the 2.0 branch) contains a stored CSS injection vulnerability in the Markdown image resize() media action. Prior media hardening rejects direct ?style= payloads and unsafe attribute() fallbacks, but the resize() action in…
When was CVE-2026-58657 disclosed?
CVE-2026-58657 was first published in the National Vulnerability Database on July 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58657 actively exploited?
CVE-2026-58657 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 70.0% of all scored CVEs.
What is the CVSS score of CVE-2026-58657?
CVE-2026-58657 has a CVSS v3 base score of 4.8 (NVD).
How do I remediate CVE-2026-58657?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58657, 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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