CVE-2026-31969 is a high-severity heap buffer overflow vulnerability affecting HTSlib versions prior to 1.23.1, 1.22.2, and 1.21.1. This flaw occurs when processing specially crafted CRAM bioinformatics files, leading to an out-by-one error that can cause program crashes, data corruption, or potentially arbitrary code execution. Exploitation requires user interaction, such as opening a malicious file, but has low attack complexity, resulting in a CVSS score of 8.1. There is currently no evidence of active exploitation, public exploit code, or significant community discussion regarding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.21.1CPE matchmatch criteria | cpe:2.3:a:htslib:htslib:*:*:*:*:*:*:*:* | ||
>= 1.22, < 1.22.2CPE matchmatch criteria | cpe:2.3:a:htslib:htslib:*:*:*:*:*:*:*:* | ||
1.23CPE matchmatch criteria | cpe:2.3:a:htslib:htslib:1.23:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/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
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.
Remediation records are not available for this CVE.