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ALSA-2026:16252 — Important: jq security update

Affected: AlmaLinux:8: jq, AlmaLinux:8: jq-devel

jq is a lightweight and flexible command-line JSON processor. jq is like sed for JSON data. You can use it to slice, filter, map, or transform structured data with the same ease that sed, awk, grep, or similar applications allow you to manipulate text.

Security Fix(es):

* jq: out-of-bounds read in jv_parse_sized() on error formatting for non-NUL-terminated buffers (CVE-2026-39979) * jq: jq: Denial of Service via crafted JSON object causing hash collisions (CVE-2026-40164)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

bdu:2026-05546

BELL-CVE-2026-40164

Affected: Alpaquita:23: jq, Alpaquita:25: jq, Alpaquita:stream: jq

certfr-2026-avi-0463 — De multiples vulnérabilités ont été découvertes dans les produits Microsoft. Elles permettent à un attaquant de provoqu…

certfr-2026-avi-0463

EUVD-2026-362255

fkie_cve-2026-40164

jq is a command-line JSON processor. Before commit 0c7d133c3c7e37c00b6d46b658a02244fdd3c784, jq used MurmurHash3 with a hardcoded, publicly visible seed (0x432A9843) for all JSON object hash table operations, which allowed an attacker to precompute key collisions offline. By supplying a crafted JSON object (~100 KB) where all keys hashed to the same bucket, hash table lookups degraded from O(1) to O(n), turning any jq expression into an O(n²) operation and causing significant CPU exhaustion. This affected common jq use cases such as CI/CD pipelines, web services, and data processing scripts, and was far more practical to exploit than existing heap overflow issues since it required only a small payload. This issue has been patched in commit 0c7d133c3c7e37c00b6d46b658a02244fdd3c784.

msrc_CVE-2026-40164 — jq: Algorithmic complexity DoS via hardcoded MurmurHash3 seed

msrc_CVE-2026-40164

OESA-2026-1981 — jq security update

Affected: openEuler:24.03-LTS: jq, openEuler:24.03-LTS-SP1: jq, openEuler:24.03-LTS-SP2: jq, openEuler:24.03-LTS-SP3: jq, openEuler:20.03-LTS-SP4: jq, openEuler:22.03-LTS-SP4: jq

jq is a lightweight and flexible command-line JSON processor. you can use it to slice and filter and map and transform structured data. It is written in portable C, and it has zero runtime dependencies. it can mangle the data format that you have into the one that you want. Security Fix(es):

jq is a command-line JSON processor. An integer overflow vulnerability exists through version 1.8.1 within the jvp_string_append() and jvp_string_copy_replace_bad functions, where concatenating strings with a combined length exceeding 2^31 bytes causes a 32-bit unsigned integer overflow in the buffer allocation size calculation, resulting in a drastically undersized heap buffer. Subsequent memory copy operations then write the full string data into this undersized buffer, causing a heap buffer overflow classified as CWE-190 (Integer Overflow) leading to CWE-122 (Heap-based Buffer Overflow). Any system evaluating untrusted jq queries is affected, as an attacker can crash the process or potentially achieve further exploitation through heap corruption by crafting queries that produce extremely large strings. The root cause is the absence of string size bounds checking, unlike arrays and objects which already have size limits. The issue has been addressed in commit e47e56d226519635768e6aab2f38f0ab037c09e5.(CVE-2026-32316)

jq is a command-line JSON processor. In versions 1.8.1 and below, functions jv_setpath(), jv_getpath(), and delpaths_sorted() in jq's src/jv_aux.c use unbounded r…

openSUSE-SU-2026:10850-1 — jq-1.8.1-3.1 on GA media

jq-1.8.1-3.1 on GA media

RHSA-2026:18040 — Red Hat Security Advisory: jq security update

jq: out-of-bounds read in jv_parse_sized() on error formatting for non-NUL-terminated buffers jq: jq: Denial of Service via crafted JSON object causing hash collisions

RLSA-2026:19151 — Important: jq security update

Affected: Rocky Linux:10: jq

Security Fix(es):

* jq: out-of-bounds read in jv_parse_sized() on error formatting for non-NUL-terminated buffers (CVE-2026-39979)

* jq: jq: Denial of Service via crafted JSON object causing hash collisions (CVE-2026-40164)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

SUSE-SU-2026:22545-1 — Security update for jq

Security update for jq

UBUNTU-CVE-2026-40164

Affected: Ubuntu:Pro:14.04:LTS: jq, Ubuntu:Pro:16.04:LTS: jq, Ubuntu:Pro:18.04:LTS: jq, Ubuntu:Pro:20.04:LTS: jq, Ubuntu:22.04:LTS: jq, Ubuntu:24.04:LTS: jq, Ubuntu:25.10: jq, Ubuntu:26.04:LTS: jq

WID-SEC-W-2026-1183 — Red Hat Hardened Images RPMs (jq und pyOpenSSL): Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat Red Hat Hardened Images RPMs ausnutzen, um Sicherheitsvorkehrungen zu umgehen, einen Denial-of-Service-Zustand verursachen, vertrauliche Informationen offenlegen oder nicht näher spezifizierte Angriffe durchführen, einschließlich potenzieller Codeausführung.