Cross-Site Scripting (XSS) in Craft CMS (CVE-2026-72787)
Summary
Cross-site scripting in Craft CMS (CVE-2026-72787). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
The control-panel helper that renders element chip/card labels writes an element's draftName into the page without HTML-encoding it, while the surrounding path segments are encoded.
A low-privilege control-panel user who can create a draft of an element (for example, an entry) controls the draft name, so they can store an XSS payload that executes in the browser of any other control-panel user who is shown that element’s chip or card (element indexes with drafts visible, relation and element-selection fields that reference the element, and the drafts list).
This allows a low-privilege author to run JavaScript in an administrator’s authenticated session and take over the control panel. It is the same output-encoding class as the recently fixed GHSA-xrqc-p465-2xvg (Structure entry title) and GHSA-3x4w-mxpf-fhqq (revision context menu), which encoded other user-controlled titles but not the draft name.
Prerequisites
- A control-panel account with permission to edit entries in at least one section and create drafts.
- A higher-privileged user (for example, an administrator) who is later shown the draft’s chip or card (an element index with drafts visible, or a relation/element-selection field referencing the element).
Limitations
- Requires the victim to be shown the affected element's chip/card in the control panel (normal day-to-day activity; element indexes and relation fields are routine).
- The payload runs in the control-panel origin in the victim’s session.…
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-72787 has been found in Craft CMS.
Risk of unauthorized operations or information disclosure. CVSS score: 6.4/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Craft CMS CVE-2026-72787" on the vendor's site.
CVE-2026-72787 (Craft CMS) — CWE-79 / CVSS v3 6.4
Attack vector: remote (network-reachable) / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Cross-site scripting (XSS) (CWE-79) exists in Craft CMS.
Check the vendor advisory for the affected versions of Craft CMS.
Severity: Medium (CVSS 6.4/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Craft CMS を使っているサービスとバージョンを洗い出す。
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2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- package github.com
- web github.com
- web disclosure@vulncheck.com
- web nvd.nist.gov
- web github.com
- web github.com
- web github.com