PT-2026-51160 · Jq · Jq

Published 2026-06-09 · Updated 2026-06-25 · CVE-2026-49839

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

Name of the Vulnerable Software and Affected Versions jq versions prior to 1.8.2

Description In assertion-disabled builds, the jq --rawfile command can lead to invalid-state reuse and a heap out-of-bounds write. This occurs when the jv load file(raw=1) function reads an attacker-controlled file and repeatedly appends chunks to a string accumulator. If the jv string append buf() function returns a "String too long" error, the loop continues to append subsequent file chunks to the already invalid object. This invalid object is then incorrectly interpreted as a string object, resulting in a heap-buffer-overflow.

Recommendations Update to version 1.8.2.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-49839

ECHO-8A1C-E3DF-AE5B

Affected Products

Jq

References · 9

• 🔥 https://github.com/jqlang/jq/security/advisories/GHSA-cfh2-vwfq-qfmm · Exploit
• https://osv.dev/vulnerability/BELL-CVE-2026-49839 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-49839 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-49839 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-49839 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-49839 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-49839 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-49839 · Vendor Advisory
• https://docs.bell-sw.com/security/cves/CVE-2026-49839 · Note