CVE-2026-54679

EUVD-2026-39499
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
GitHub_MCNA
6.9 MEDIUM
LOCAL
LOW
NONE
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
jqlangjq
𝑥
< 1.8.2
CNA
Debian logo
Debian Releases
Debian Product
Codename
jq
bookworm
vulnerable
bullseye
vulnerable
bullseye (security)
vulnerable
forky
vulnerable
sid
1.8.2-1
fixed
trixie
vulnerable
Common Weakness Enumeration
References
https://github.com/jqlang/jq/security/advisories/GHSA-29gj-222p-j7vx