What is CVE-2026-54679?

CVE-2026-54679 is a medium-severity vulnerability in Jqlang Jq, classified under Integer Overflow or Wraparound. CVSS score: 5.5/10. Published 2026-06-25.

How severe is CVE-2026-54679?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Integer overflow in Jqlang Jq

CVE-2026-54679

jq is a command-line JSON processor. Prior to 1.8.2, on 32bit system, jvp_string_append has a chance of integer/multiple overflowing and then causing a massive buffer overrun. This vulnerability is fixed in 1.8.2.

Vulnerability class: Integer Overflow

Published 2026-06-25 · last modified 2026-06-26.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.001 (3.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

Jqlang Jq — versions < 1.8.2

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

github.com/jqlang/jq/security/advisories/GHSA-29gj-222p-j7vx (Vendor Advisory)

Frequently asked questions

What is CVE-2026-54679?: CVE-2026-54679 is a medium-severity vulnerability in Jqlang Jq, classified under Integer Overflow or Wraparound. CVSS score: 5.5/10. Published 2026-06-25.
How severe is CVE-2026-54679?: Medium severity. CVSS v3 base score is 5.5 out of 10.