CVE-2026-102521 lib0 `readFromDataView` out-of-bounds read
An out-of-bounds read in lib0 allows attackers to expose adjacent process memory, potentially leaking sensitive data like credentials or logs.
- 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-2026-102521?
CVE-2026-102521 is a high-severity vulnerability in dmonad lib0, published on 29 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The decoder in `readFromDataView` in lib0 before 0.2.119 can be tricked into reading more than it should from a buffer. The vulnerability allows reading past the decoders' view, thus exposing adjacent process memory. This can be anything that is currently in the head, for example credentials or logs. This is similar to but different from GHSA-r5c8-rf4w-qrq8.
Weakness: CWE-125
Which versions are affected by CVE-2026-102521?
How do I fix CVE-2026-102521?
No fix has been published for CVE-2026-102521 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-102521 being exploited?
There is no known exploitation of CVE-2026-102521 in the wild and no public exploit code.
Sources
Also known as GHSA-g75x-89c3-rvmr.