CVE-2026-86824 Newsletter < 9.3.8 - Unauthenticated Subscriber PII Disclosure and Modification via Predictable Tracking Signature Key
Unauthenticated attackers can forge tracking links to read and modify subscriber personal data due to weak cryptographic key generation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86824?
CVE-2026-86824 is a medium-severity vulnerability in Unknown Newsletter, published on 17 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Newsletter WordPress plugin before 9.3.8 does not generate its email tracking signing key with sufficient entropy and signs its tracking links with an unkeyed hash, allowing an unauthenticated attacker who recovers that key offline to forge tracking links, obtain any subscriber's session token, and read and modify that subscriber's stored personal data.
Weakness: CWE-326
Which versions are affected by CVE-2026-86824?
How do I fix CVE-2026-86824?
No fix has been published for CVE-2026-86824 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-86824 being exploited?
There is no known exploitation of CVE-2026-86824 in the wild and no public exploit code.
Sources
Also known as GHSA-w6v2-ggcj-c4hg.