nmslib hnswlib · LoadIndex Function
Affects hnswlibSource GCVE Database
Not known to be exploited · CVSS 7.1 High.
Data as of 13 Nov 2026, 22:37 UTC
Thin evidence
One scorer or none| CISA-ADP | CVSS 3.1 | 7.1 |
|---|
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 9 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10hnswlibpkg:deb/ubuntu/hnswlib?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTShnswlibpkg:deb/ubuntu/hnswlib?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTShnswlibpkg:deb/ubuntu/hnswlib?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 22.04 LTShnswlibpkg:deb/ubuntu/hnswlib?arch=source&distro=jammyOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Until a fix is available, avoid loading untrusted or unauthenticated serialized HNSW index files to mitigate risk.
Description
The loadIndex function in nmslib hnswlib and Spotify Voyager improperly validates the element count in a serialized HNSW index. This flaw allows an attacker to supply a crafted index file with an element count exceeding the allocated buffer capacity, leading to a heap buffer overflow and potential application crash upon loading the file.