CVE-2026-55794

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 65% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.7EG
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: 8.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Craft CMS is a content management system (CMS). In versions 5.9.0 and above prior to 5.10.0, control panel users with the ability to edit entries can execute unsandboxed Twig code via the HTTP Referrer header, potentially leading to authenticated RCE. The issue happens when a user is saving entries. Strings for a signed redirect URL are being compiled as a Twig template via renderObjectTemplate(), and while a sandboxed alternative already exists (renderSandboxedObjectTemplate()), it is not used in this case. This signed URL can be specified by users, as it is reflected in the “Referer” HTTP request header, which is under attacker control. This issue has been fixed in version 5.10.0.

CVSS v3
8.7
EG Score
8.7HIGHmedium confidence
EG Risk
44
EG Risk 44/100

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
Severity87% × 45%
Exploitation0% × 40%
Automatability30% × 15%
EPSS PROB
0.4%
EPSS %ILE
33rd
KEV
Not listed

Published

July 2, 2026

Last Modified

July 2, 2026

Advisory Details (2)

Auto-updated Jul 2, 2026
Patch available. Sources: github_pr, github.
githubMentions a patch (unverified)

Potential authenticated Remote Code Execution via referrer redirect · Advisory · craftcms/cms · GitHub

https://github.com/craftcms/cms/security/advisories/GHSA-f74w-488g-8x5r
github_pr Patch Available

Explicitly set `returnUrl` params on element edit pages

Patch available: craftcms/cms 5.10.0 (PR #18680 merged 2026-04-17)

https://github.com/craftcms/cms/pull/18680

Vendor Advisories for CVE-2026-55794(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
craftcms/cms5.9.0 ... 5.9.9 (24 versions)
  • 5.9.0 up to 5.10.0: fixed in 5.10.0
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 30× 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 140 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-55794?
CVE-2026-55794 is a high vulnerability published on July 2, 2026. Craft CMS is a content management system (CMS). In versions 5.9.0 and above prior to 5.10.0, control panel users with the ability to edit entries can execute unsandboxed Twig code via the HTTP Referrer header, potentially leading to authenticated RCE. The issue happens when a user is saving…
When was CVE-2026-55794 disclosed?
CVE-2026-55794 was first published on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55794 actively exploited?
CVE-2026-55794 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (33rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55794?
CVE-2026-55794 has a CVSS base score of 8.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-55794?
A fix for CVE-2026-55794 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-55794 are linked in the Vendor Advisories panel on this page.

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