CVE-2026-72832 Grav before 2.0.13 Stored XSS via quoted-attribute bypass
A stored XSS vulnerability in Grav CMS allows attackers to execute arbitrary scripts in the victim's browser via crafted HTML attributes.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-72832?
CVE-2026-72832 is a medium-severity cross-site scripting vulnerability in getgrav grav, published on 14 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Grav versions from 1.5.2 through 2.0.12 contain a stored cross-site scripting vulnerability in the Security::detectXss() function (system/src/Grav/Common/Security.php). The event-handler scan is anchored at `<` and uses `[^>]*?`, which cannot cross the first literal `>`; when a `>` appears inside a quoted attribute value the browser keeps the tag open and parses a subsequent event handler (e.g. onerror), so the detector and browser disagree. A page editor without admin.super privileges can save page content such as `<img src=x title=">" onerror=alert(document.domain)>`, which is accepted, stored, and executed in the site origin when any visitor (including unauthenticated users) views the page. Fixed in 2.0.13.
Weakness: CWE-79
Which versions are affected by CVE-2026-72832?
2 open source packages ship an affected version, including getgrav/grav.
| Package | Affected | Fixed in |
|---|---|---|
getgrav/grav Packagist | From 1.5.2 | 2.0.13 |
getgrav/grav Packagist | From 1.5.2 | 2.0.13 |
How do I fix CVE-2026-72832?
Upgrade getgrav/grav to 2.0.13 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-72832 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-72832 exists.
Sources
Also known as GHSA-269c-h76q-8cxw.