Import Source
https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-82973.json
JSON Data
https://api.osv.dev/v1/vulns/AZL-82973
Upstream
Published
2026-04-13T23:16:27Z
Modified
2026-08-30T05:26:50Z
Summary
CVE-2026-39956 affecting package jq for versions less than 1.7.1-5
Details

jq is a command-line JSON processor. In commits after 69785bf77f86e2ea1b4a20ca86775916889e91c9, the strindices builtin in jq's src/builtin.c passes its arguments directly to jvstringindexes() without verifying they are strings, and jvstring_indexes() in src/jv.c relies solely on assert() checks that are stripped in release builds compiled with -DNDEBUG. This allows an attacker to crash jq trivially with input like _strindices(0), and by crafting a numeric value whose IEEE-754 bit pattern maps to a chosen pointer, achieve a controlled pointer dereference and limited memory read/probe primitive. Any deployment that evaluates untrusted jq filters against a release build is vulnerable. This issue has been patched in commit fdf8ef0f0810e3d365cdd5160de43db46f57ed03.

References

Affected packages

Azure Linux:3 / jq

Package

Name
jq
Purl
pkg:rpm/azure-linux/jq

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.7.1-5

Database specific

source
"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-82973.json"