CVE-2026-124959
HIGH
MEDIUM
Priority: 0.01
BB Relevance:
39/100
Published: 2026-11-09
Modified: 2026-11-12
First seen: 2026-11-09
Status: active
Attack Surface
Low Complexity
No Auth
Integ. Impact
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
None
UI:
Required
S:
Unchanged
C:
None
I:
High
A:
High
Description
The loadIndex function in nmslib hnswlib and Spotify Voyager does not verify that the element count in a serialized HNSW index is within the stored capacity used to allocate the heap buffer. An attacker can supply a crafted index file with an element count greater than the stored capacity, causing the loader to write beyond the allocated buffer and potentially crash the application when it loads the file.