CVE-2026-116742

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.12% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 2.0% of scored records. A rank, not a probability.

NVD base score

4.8 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-10-27.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-10-26 21:52Z2 DAYS AGO

Last updated

2026-10-27 14:16Z1 DAY AGO

Reserved

2026-10-26

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Medium (CVSS 4.8)

CNA CVSS vector

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

Weaknesses

• CWE-197Numeric Truncation ErrorBase

Data version

5.2

Document digest

249f5058fce81b687605d5766204d6231df48c47d58eca9ef66e872f423b95e3

• github.comPull Request #2057https://github.com/samtools/htslib/pull/2057issue-trackingpatch
• github.comPatch Commithttps://github.com/samtools/htslib/commit/18dddf02bb2c0053b32acec427723555a24b2873patch
• github.comhttps://github.com/samtools/htslibproduct
• github.comhttps://github.com/samtools/htslib/blob/1.24/bgzf.c#L2504technical-description
• hackmd.iohttps://hackmd.io/@haindpwn/htslib-bgzf-gzi-int-truncation-oobthird-party-advisory
• github.comhttps://github.com/samtools/htslib/issues/2113issue-tracking
• www.vulncheck.comVulnCheck Advisory: HTSlib through 1.24 Heap Out-of-Bounds Write via Truncated .gzi Index Counthttps://www.vulncheck.com/advisories/htslib-through-1.24-heap-out-of-bounds-write-via-truncated-gzi-index-countthird-party-advisory