CVE-2026-58657

MEDIUMPre-NVD 4.84.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source
Elevated
4.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 4.8Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

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
4.8MEDIUMmedium confidence
EG Risk
38
EG Risk 38/100

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 (value × EchelonGraph’s weight)
Severity48% × 45%
The EG Score, 4.8 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
17th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 8, 2026

Last Modified

October 8, 2026

Advisory Details (4)

Auto-updated Jul 9, 2026
Patch available. Sources: github_commit, github.
GitHub advisoryMentions a patch (unverified)

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
Web page

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.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
getgrav/grav2.0.0-rc.10, 2.0.0-rc.9
  • 2.0.0-rc.9 up to 2.0.0: fixed in 2.0.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 37× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 187 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 87 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  3. 2026-10-12 15:53 UTCEG score recompute
  4. 2026-10-11 19:36 UTCEG score recompute
  5. 2026-10-11 16:51 UTCEG score recompute
  6. 2026-10-11 14:14 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  10. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  11. 2026-10-08 16:40 UTCEG score recompute
  12. 2026-10-08 15:46 UTCEG score recompute
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  17. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  18. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  19. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  20. 2026-10-01 16:13 UTCEG score recompute
  21. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  22. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  23. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  24. 2026-09-28 13:25 UTCEG score recompute
  25. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 28th percentile
Show 75 more
  1. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  2. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  3. 2026-09-24 11:52 UTCEG score recompute
  4. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  5. 2026-09-23 06:12 UTCEG score recompute
  6. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  7. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  8. 2026-09-18 05:45 UTCEG score recompute
  9. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  10. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  11. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  12. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  13. 2026-09-14 08:46 UTCEG score recompute
  14. 2026-09-14 08:46 UTCGHSA enrichmentGHSA-4wj4-79rr-pvff · GitHub CVSS 4.8
  15. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  16. 2026-09-13 08:26 UTCEG score recompute
  17. 2026-09-13 08:26 UTCGHSA enrichmentGHSA-4wj4-79rr-pvff · GitHub CVSS 4.8
  18. 2026-09-12 03:37 UTCEG score recompute
  19. 2026-09-12 03:37 UTCGHSA enrichmentGHSA-4wj4-79rr-pvff · GitHub CVSS 4.8
  20. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  21. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  22. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  23. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  24. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  25. 2026-09-05 22:49 UTCEG score recompute
  26. 2026-09-05 22:49 UTCGHSA enrichmentGHSA-4wj4-79rr-pvff · GitHub CVSS 4.8
  27. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  28. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  29. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  30. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  31. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  32. 2026-08-30 07:37 UTCEG score recompute
  33. 2026-08-30 07:37 UTCGHSA enrichmentGHSA-4wj4-79rr-pvff · GitHub CVSS 4.8
  34. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  35. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  36. 2026-08-27 21:51 UTCEG score recompute
  37. 2026-08-27 21:51 UTCGHSA enrichmentGHSA-4wj4-79rr-pvff · GitHub CVSS 4.8
  38. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  39. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  40. 2026-08-26 08:27 UTCEG score recompute
  41. 2026-08-26 08:27 UTCGHSA enrichmentGHSA-4wj4-79rr-pvff · GitHub CVSS 4.8
  42. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  43. 2026-08-25 04:48 UTCEG score recompute
  44. 2026-08-25 04:47 UTCGHSA enrichmentGHSA-4wj4-79rr-pvff · GitHub CVSS 4.8
  45. 2026-08-24 04:28 UTCGHSA enrichmentGHSA-4wj4-79rr-pvff · GitHub CVSS 4.8
  46. 2026-08-23 04:09 UTCEG score recompute
  47. 2026-08-23 04:09 UTCGHSA enrichmentGHSA-4wj4-79rr-pvff · GitHub CVSS 4.8
  48. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  49. 2026-08-22 03:50 UTCEG score recompute
  50. 2026-08-22 03:50 UTCGHSA enrichmentGHSA-4wj4-79rr-pvff · GitHub CVSS 4.8
  51. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  52. 2026-08-21 02:22 UTCEG score recompute
  53. 2026-08-21 02:22 UTCGHSA enrichmentGHSA-4wj4-79rr-pvff · GitHub CVSS 4.8
  54. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  55. 2026-08-20 02:02 UTCEG score recompute
  56. 2026-08-20 02:02 UTCGHSA enrichmentGHSA-4wj4-79rr-pvff · GitHub CVSS 4.8
  57. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  58. 2026-08-18 22:53 UTCEG score recompute
  59. 2026-08-18 22:53 UTCGHSA enrichmentGHSA-4wj4-79rr-pvff · GitHub CVSS 4.8
  60. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  61. 2026-08-17 22:30 UTCEG score recompute
  62. 2026-08-17 22:30 UTCGHSA enrichmentGHSA-4wj4-79rr-pvff · GitHub CVSS 4.8
  63. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  64. 2026-08-16 19:38 UTCEG score recompute
  65. 2026-08-16 19:38 UTCGHSA enrichmentGHSA-4wj4-79rr-pvff · GitHub CVSS 4.8
  66. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  67. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  68. 2026-08-15 19:08 UTCEG score recompute
  69. 2026-08-15 19:08 UTCGHSA enrichmentGHSA-4wj4-79rr-pvff · GitHub CVSS 4.8
  70. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  71. 2026-08-14 18:48 UTCEG score recompute
  72. 2026-08-14 18:48 UTCGHSA enrichmentGHSA-4wj4-79rr-pvff · GitHub CVSS 4.8
  73. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  74. 2026-08-13 18:29 UTCGHSA enrichmentGHSA-4wj4-79rr-pvff · GitHub CVSS 4.8
  75. 2026-08-12 18:11 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-58657?
CVE-2026-58657 is a medium-severity vulnerability; its CVE record was 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 made public?
CVE-2026-58657 was made public on June 22, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on July 8, 2026. EchelonGraph's copy of the record carries a last-modified date of October 8, 2026; the record at its source may have been updated since.
Is CVE-2026-58657 actively exploited?
CVE-2026-58657 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (17th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-58657?
CVE-2026-58657 has a CVSS base score of 4.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-58657?
A fix for CVE-2026-58657 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-58657 are linked in the Vendor Advisories panel on this page.

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