CVE-2026-54679 jq: potential integer overflow in jvp_string_append
An integer overflow in jq on 32-bit systems can lead to buffer overruns, potentially allowing code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-54679?
CVE-2026-54679 is a medium-severity vulnerability in jqlang jq, published on 25 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-190
Which versions are affected by CVE-2026-54679?
It affects 1 product.
Products include Jqlang Jq.
How do I fix CVE-2026-54679?
Upgrade to a fixed version.
Is CVE-2026-54679 being exploited?
There is no known exploitation of CVE-2026-54679 in the wild and no public exploit code.
Other vulnerabilities in jqlang jq
- CVE-2026-32316 jq: Integer overflow in jvp_string_append() allows Heap-based Buffer Overflow
- CVE-2024-53427 Memory corruption in jq
- CVE-2025-48060 AddressSanitizer: stack-buffer-overflow in jq_fuzz_execute (jv_string_vfmt)
- CVE-2023-49355 Memory corruption in n/a
- CVE-2026-49839 jq --rawfile invalid-state reuse after String too long causes heap-buffer-overflow
Sources
Also known as ALPINE-CVE-2026-54679, BELL-CVE-2026-54679, CLSA-2026-1782983956, DEBIAN-CVE-2026-54679, ECHO-dfa5-57c7-ba16, GHSA-29gj-222p-j7vx and 1 more.