Vulnerability · Published Sep 29, 2026 · Assigned by GitHub_M
CVE-2026-102521lib0 `readFromDataView` out-of-bounds read
High 8.6
In plain English
A high-severity out-of-bounds read in lib0 from dmonad. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities).
Severity (CVSS 3.1)8.6High
Exploit odds (30 days)0.3%top 82.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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.
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
References
- https://github.com/dmonad/lib0/security/advisories/GHSA-g75x-89c3-rvmr x_refsource_CONFIRM
- https://github.com/dmonad/lib0/commit/49383f2716283b90059dbfe01e110c0ab7ef5592 x_refsource_MISC