CVE-2026-18311 CVE-2026-18311
Attackers can execute arbitrary scripts in the Readwise Reader Android app via stored XSS in imported document metadata, potentially compromising synced devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-18311?
CVE-2026-18311 is a medium-severity cross-site scripting vulnerability in Readwise Reader, published on 25 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Readwise Reader for Android contains a cross-site scripting vulnerability due to missing HTML sanitization in its processing of imported document metadata. Attacker-controlled fields such as the author meta tag are inserted into a WebView via innerHTML, enabling stored XSS that executes on synced devices when the malicious document is opened.
Weakness: CWE-79
Which versions are affected by CVE-2026-18311?
How do I fix CVE-2026-18311?
No fix has been published for CVE-2026-18311 yet. Limit exposure of the affected software until one is available.
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-2026-18311 being exploited?
There is no known exploitation of CVE-2026-18311 in the wild and no public exploit code.
Sources
Also known as GHSA-p2jj-7m4x-3gfh.