Skip to main content
EPSS 0.2%top 89%

CVE-2025-9403: Reachable Assertion in jqlang jq

0
Medium
VulnerabilityCVE-2025-9403cvecve-2025-9403
Published: 08/25/2025 (08/25/2025, 02:02:07 UTC)
Source: CVE Database V5
Vendor/Project: jqlang
Product: jq

Description

CVE-2025-9403 is a medium severity vulnerability in the jq JSON parser up to version 1.6. It affects the run_jq_tests function in the jq_test.c file, where a reachable assertion can be triggered by a local attacker. Exploitation requires local access and no user interaction. The vulnerability has been publicly disclosed, but no official patch or remediation guidance is currently provided. Other versions beyond 1.6 might also be affected.

CVSS v4.0

Score 4.8medium

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Vuln. Confidentiality
None
Vuln. Integrity
None
Vuln. Availability
Low
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

Affected software

Affected versions
=1.0=1.1=1.2=1.3=1.4=1.5=1.6

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 06/03/2026, 21:17:22 UTC

Technical Analysis

This vulnerability in jqlang jq (up to version 1.6) involves a reachable assertion failure in the run_jq_tests function within the jq_test.c source file. The flaw can be triggered by a local attacker manipulating inputs to cause an assertion to be reached, potentially leading to a denial of service or application crash. The vulnerability requires local access and does not involve user interaction or elevated privileges beyond local user rights. The CVSS 4.8 score reflects medium severity with local attack vector and low complexity.

Potential Impact

The impact is limited to local users who can execute or manipulate the jq testing function, potentially causing the application to assert and terminate unexpectedly. This may lead to denial of service conditions but does not indicate remote code execution or privilege escalation. No known exploits in the wild have been reported.

Mitigation Recommendations

No official patch or remediation has been disclosed by the vendor at this time. Since the vulnerability requires local access and affects a testing function, restricting local access to trusted users and avoiding use of vulnerable jq test components may reduce risk. Monitor the vendor advisory for updates and apply patches promptly once available. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.

Pro Console: star threats, build custom feeds, automate alerts via Slack, email & webhooks.Upgrade to Pro

Technical Details

Data Version
5.1
Assigner Short Name
VulDB
Date Reserved
2025-08-24T15:01:34.848Z
Cvss Version
4.0
State
PUBLISHED

Threat ID: 68abcb47ad5a09ad00477636

Added to database: 08/25/2025, 02:32:39 UTC

Last enriched: 06/03/2026, 21:17:22 UTC

Last updated: 09/10/2026, 19:36:52 UTC

Views: 250

Community Reviews

0 reviews

Crowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.

Sort by
Loading community insights…

Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.

Actions

PRO

Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.

Please log in to the Console to use AI analysis features.

Need more coverage?

Upgrade to Pro Console for AI refresh and higher limits.

For incident response and remediation, OffSeq services can help resolve threats faster.

Latest Threats

Breach by OffSeqOFFSEQFRIENDS — 25% OFF

Check if your credentials are on the dark web

Instant breach scanning across billions of leaked records. Free tier available.

Scan now
OffSeq TrainingCredly Certified

Lead Pen Test Professional

Technical5-day eLearningPECB Accredited
View courses