Is CVE-2026-31965 actively exploited?

No active exploitation of CVE-2026-31965 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-31965 be exploited remotely?

Yes. CVE-2026-31965 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-31965?

CVE-2026-31965 has a CVSS score of 8.2 (HIGH).

HOME VULNERABILITIESCVE-2026-31965

HIGH

CVE-2026-31965

CWE-125Published: March 18, 2026· Updated: Mar 19, 2026

8.2

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:12.0th

Official Description

HTSlib is a library for reading and writing bioinformatics file formats. CRAM is a compressed format which stores DNA sequence alignment data. In the `cram_decode_slice()` function called while reading CRAM records, validation of the reference id field occurred too late, allowing two out of bounds reads to occur before the invalid data was detected. The bug does allow two values to be leaked to the caller, however as the function reports an error it may be difficult to exploit them. It is also possible that the program will crash due to trying to access invalid memory. Versions 1.23.1, 1.22.2 and 1.21.1 include fixes for this issue. There is no workaround for this issue.

NVD Source

Technical Analysis

CVE-2026-31965 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 8.2.