CVE-2026-58655

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-15. the CNA's CVSS baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this weekElevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: Elevated riskExposed: 0

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

The bundled Grav Flex Objects plugin (getgrav/grav-plugin-flex-objects) before 1.4.0 contains a stored server-side template injection vulnerability. When rendering dynamic collection or object titles, the plugin passes user-controlled frontmatter values (page.header.flex.collection.title or page.header.flex.object.title) to Twig's template_from_string(), causing them to be evaluated as Twig code rather than treated as text. This path bypasses Grav's Security::cleanDangerousTwig() sanitization. An attacker who can control the title frontmatter of a publicly reachable Flex Objects page can achieve arbitrary Twig execution and escalate to remote command execution via access to internal Grav services such as the scheduler.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
63%
KEV
Not listed

Published

July 15, 2026

Last Modified

July 28, 2026

Advisory Details (2)

Auto-updated Jul 15, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Grav Flex Objects - Server-Side Template Injection via Dynamic Titles | Advisories | VulnCheck

https://www.vulncheck.com/advisories/grav-flex-objects-server-side-template-injection-via-dynamic-titles
github Patch Available🟡 PoC Available

Flex Objects stored Twig SSTI in dynamic titles can lead to remote code execution · Advisory · getgrav/grav · GitHub

https://github.com/getgrav/grav/security/advisories/GHSA-623v-m3c4-3pw8

Vendor Advisories for CVE-2026-58655(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 21× in last 7d / 115× 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 162 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-58655?
CVE-2026-58655 is a high vulnerability published on July 15, 2026. The bundled Grav Flex Objects plugin (getgrav/grav-plugin-flex-objects) before 1.4.0 contains a stored server-side template injection vulnerability. When rendering dynamic collection or object titles, the plugin passes user-controlled frontmatter values (page.header.flex.collection.title or…
When was CVE-2026-58655 disclosed?
CVE-2026-58655 was first published in the National Vulnerability Database on July 15, 2026, with the most recent update on July 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58655 actively exploited?
CVE-2026-58655 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 36.7% of all scored CVEs.
What is the CVSS score of CVE-2026-58655?
CVE-2026-58655 has a CVSS v4.0 base score of 8.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-58655?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58655, 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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