CVE-2026-73524 Cypht < 2.12.2 XSS via FROM Email Header in Contacts Module
Remote attackers can execute arbitrary scripts in victims' browsers via malicious FROM headers in Cypht's contacts module.
- 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-2026-73524?
CVE-2026-73524 is a medium-severity cross-site scripting vulnerability in cypht-org cypht, published on 1 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
Cypht before 2.12.2 contains a cross-site scripting vulnerability in the contacts module that allows remote attackers to execute arbitrary script content by embedding malicious payloads within angle brackets in the FROM email header. The sanitization logic removes only the first occurrence of each angle bracket character, leaving additional angle brackets intact, which attackers exploit by delivering a crafted email whose FROM header executes script in the victim's browser when the user opens the message and accesses the Add Local Contacts function.
Weakness: CWE-79
Which versions are affected by CVE-2026-73524?
How do I fix CVE-2026-73524?
No fix has been published for CVE-2026-73524 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-2026-73524 being exploited?
There is no known exploitation of CVE-2026-73524 in the wild and no public exploit code.
Sources
Also known as GHSA-r7q3-25g3-96cc.