Improper input validation in Jqlang Jq
CVE-2026-43895
jq is a command-line JSON processor. In 1.8.1 and earlier, jq accepts embedded NUL bytes in import paths at the jq-language level, but later resolves those paths through C string operations during module and data-file lookup. This creates a mismatch between the logical import string that policy or audit code may validate and the on-disk path that jq actually opens.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (3.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 3.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: -0.000
Affected products
- Jqlang Jq — versions <= 1.8.1
Weakness classification (CWE)
References
- github.com/jqlang/jq/security/advisories/GHSA-7q7g-mrq3-phxr (Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-43895?
- CVE-2026-43895 is a medium-severity vulnerability in Jqlang Jq, classified under Improper Input Validation. CVSS score: 4.4/10. Published 2026-05-11.
- How severe is CVE-2026-43895?
- Medium severity. CVSS v3 base score is 4.4 out of 10.