CVE-2026-55790

HIGHPre-NVD 7.47.4—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 61% 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
7.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Craft CMS is a content management system (CMS). In versions 5.0.0-RC1 through 5.9.22 and 4.0.0-RC1 through 4.17.15, an attacker with only a GitHub account can plant a JavaScript payload in a craftcms/cms issue title. When a Craft admin uses the CraftSupport widget’s "Give feedback" screen and types a search term that returns the poisoned issue, the payload executes in the admin’s control panel session. No control panel account or elevated privileges are required on the attacker’s side. This issue has been fixed in versions 4.17.16 and 5.9.23.

CVSS v3
7.4
EG Score
7.4HIGHmedium 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
Severity74% × 45%
Exploitation0% × 40%
Automatability30% × 15%
EPSS PROB
0.5%
EPSS %ILE
38th
KEV
Not listed

Published

July 1, 2026

Last Modified

July 2, 2026

Advisory Details (2)

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

DOM XSS via GitHub issue title in CraftSupport widget · Advisory · craftcms/cms · GitHub

https://github.com/craftcms/cms/security/advisories/GHSA-24x4-j6x9-rfw5
github_commit Patch Available

commit 6bbb66038a26 (craftcms/cms)

Patch available: craftcms/cms 4.17.16 (contains commit 6bbb66038a26)

https://github.com/craftcms/cms/commit/6bbb66038a268552180ca5c8eed9f46ea25a4417

Vendor Advisories for CVE-2026-55790(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/cms4.0.0 ... 4.9.7 (248 versions)
  • 5.0.0-RC1 up to 5.9.23: fixed in 5.9.23
  • 4.0.0-RC1 up to 4.17.16: fixed in 4.17.16
—

Weakness Classification(1)

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 138 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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  25. 2026-09-14 00:20 UTCEG score recompute
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  1. 2026-09-13 16:47 UTCEPSS rescore
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  9. 2026-09-06 13:47 UTCEPSS rescore
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  11. 2026-09-04 05:07 UTCEPSS rescore
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  15. 2026-08-31 00:04 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. 2026-08-24 23:14 UTCEG score recompute
  26. 2026-08-24 10:40 UTCEG score recompute
  27. 2026-08-23 08:25 UTCEG score recompute
  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 07:08 UTCEG score recompute
  42. 2026-08-16 02:14 UTCEPSS rescore
  43. 2026-08-15 06:01 UTCEG score recompute
  44. 2026-08-15 01:30 UTCEPSS rescore
  45. 2026-08-14 04:44 UTCEG score recompute
  46. 2026-08-13 22:00 UTCEPSS rescore
  47. 2026-08-12 15:03 UTCEG score recompute
  48. 2026-08-12 13:51 UTCEPSS rescore
  49. 2026-08-11 13:55 UTCEG score recompute
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  60. 2026-08-05 19:17 UTCEPSS rescore
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  66. 2026-08-01 13:21 UTCEG score recompute
  67. 2026-08-01 04:16 UTCEPSS rescore
  68. 2026-07-30 23:37 UTCEG score recompute
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  72. 2026-07-28 17:45 UTCEG score recompute
  73. 2026-07-28 15:37 UTCEPSS rescore
  74. 2026-07-27 15:58 UTCEG score recompute
  75. 2026-07-27 01:49 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-55790?
CVE-2026-55790 is a high vulnerability published on July 1, 2026. Craft CMS is a content management system (CMS). In versions 5.0.0-RC1 through 5.9.22 and 4.0.0-RC1 through 4.17.15, an attacker with only a GitHub account can plant a JavaScript payload in a craftcms/cms issue title. When a Craft admin uses the CraftSupport widget’s "Give feedback" screen and types…
When was CVE-2026-55790 disclosed?
CVE-2026-55790 was first published on July 1, 2026, with the most recent update 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-2026-55790 actively exploited?
CVE-2026-55790 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (38th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55790?
CVE-2026-55790 has a CVSS base score of 7.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-55790?
A fix for CVE-2026-55790 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-55790 are linked in the Vendor Advisories panel on this page.

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