PT-2026-32565 · Jq+3 · Jq+3

Asafmeizner · Published 2026-04-13 · Updated 2026-05-24 · CVE-2026-40164

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions jq versions prior to commit 0c7d133c3c7e37c00b6d46b658a02244fdd3c784

Description The software used MurmurHash3 with a hardcoded, publicly visible seed (0x432A9843) for all JSON object hash table operations. This allows an attacker to precompute key collisions offline and supply a crafted JSON object where all keys hash to the same bucket. Consequently, hash table lookups degrade from O(1) to O(n), transforming jq expressions into O(n²) operations and causing significant CPU exhaustion. This issue impacts CI/CD pipelines, web services, and data processing scripts.

Recommendations Update to the version containing commit 0c7d133c3c7e37c00b6d46b658a02244fdd3c784.

Fix

Weakness Enumeration

CWE-328

CWE-407

Related Identifiers

ALSA-2026:16252

ALSA-2026:16692

ALSA-2026:16693

ALSA-2026:19151

ALSA-2026:19365

BDU:2026-05546

CVE-2026-40164

ECHO-472E-DB5D-AF63

OESA-2026-1981

OPENSUSE-SU-2026:10850-1

RHSA-2026:8579

USN-8202-1

USN-8202-2

Affected Products

Linuxmint

Rocky Linux

Ubuntu

Jq

References · 65

• https://linux.oracle.com/errata/ELSA-2026-16252.html · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-40164 · Vendor Advisory
• https://errata.almalinux.org/9/ALSA-2026-16693.html · Vendor Advisory
• https://osv.dev/vulnerability/USN-8202-2 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-39956 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-40164 · Security Note
• https://ubuntu.com/security/CVE-2026-32316 · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2026:16693 · Vendor Advisory
• https://errata.rockylinux.org/RLSA-2026:16693 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-40164 · Vendor Advisory
• https://errata.almalinux.org/8/ALSA-2026-16252.html · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2026:19365 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-05546 · Security Note
• https://osv.dev/vulnerability/OESA-2026-1981 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-8202-2 · Vendor Advisory