Skip to main content
VulnerabilityPublished

CVE-2026-116742: samtools htslib · Numeric Truncation Error

Affects samtools htslibSource CVE Database V5

0

Not known to be exploited · CVSS 4.8 Medium.

Data as of 26 Oct 2026, 22:15 UTC

CVSS 4.0 base score
4.8Medium
How severe the flaw is on the 0–10 CVSS scale.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
samtoolshtslibAffected
  • <=1.24
Fixed in–
GitHubhtslibpkg:github/htslibOther threatsAffected
  • <=1.24
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 processing untrusted or crafted .gzi index files with affected HTSlib versions.

Description

HTSlib versions up to 1.24 contain a heap out-of-bounds read and write vulnerability in the function bgzf_index_load_hfile() due to improper handling of a crafted .gzi index entry count. This numeric truncation error can cause heap corruption or crashes in tools such as samtools and bcftools.

References

Community reviews

Loading reviews…