CVE catalog
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 ope
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.37% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | jq | sid | 1.8.2-1 | fixed |
| Debian | jq | forky | 1.8.2-1 | fixed |
| Debian | jq | trixie | 1.7.1-6+deb13u3 | fixed |
| Debian | jq | trixie-security | 1.7.1-6+deb13u4 | fixed |
| Debian | jq | bookworm | 1.6-2.1+deb12u2 | fixed |
| Debian | jq | bookworm-security | 1.6-2.1+deb12u3 | fixed |
| Cpe | jq | Not reported | 1.7.1-3ubuntu0.24.04.2 | fixed |
| Cpe | libjq-dev | Not reported | 1.7.1-3ubuntu0.24.04.2 | fixed |
| Cpe | libjq1 | Not reported | 1.7.1-3ubuntu0.24.04.2 | fixed |
| Cpe | jq | Not reported | 1.6-2.1+deb12u2 | fixed |
| Alpine | jq | 3.22 | 1.8.2-r0 | fixed |
| Alpine | jq | 3.23 | 1.8.2-r0 | fixed |
| Alpine | jq | 3.24 | 1.8.2-r0 | fixed |
| Ubuntu | jq | pro | 1.5+dfsg-2build1 | vulnerable |
| Ubuntu | jq | pro | 1.6-1 | vulnerable |
| Ubuntu | jq | pro | 1.6-1ubuntu0.20.04.1 | vulnerable |
| Ubuntu | jq | pro | 1.6-1ubuntu0.20.04.1+esm1 | vulnerable |
| Ubuntu | jq | pro | 1.6-1ubuntu0.20.04.1+esm2 | fixed |
| Ubuntu | jq | 22.04 | 1.6-2.1ubuntu2 | vulnerable |
| Ubuntu | jq | 22.04 | 1.6-2.1ubuntu3 | vulnerable |
| Ubuntu | jq | 22.04 | 1.6-2.1ubuntu3.1 | vulnerable |
| Ubuntu | jq | 22.04 | 1.6-2.1ubuntu3.2 | fixed |
| Ubuntu | jq | 24.04 | 1.6-3 | vulnerable |
| Ubuntu | jq | 24.04 | 1.7-1 | vulnerable |
| Ubuntu | jq | 24.04 | 1.7.1-2 | vulnerable |
| Ubuntu | jq | 24.04 | 1.7.1-3 | vulnerable |
| Ubuntu | jq | 24.04 | 1.7.1-3build1 | vulnerable |
| Ubuntu | jq | 24.04 | 1.7.1-3ubuntu0.24.04.1 | vulnerable |
| Ubuntu | jq | 24.04 | 1.7.1-3ubuntu0.24.04.2 | fixed |
| Ubuntu | jq | 25.10 | 1.7.1-3ubuntu1 | vulnerable |
| Ubuntu | jq | 25.10 | 1.7.1-6ubuntu1 | vulnerable |
| Ubuntu | jq | 25.10 | 1.8.1-3ubuntu1 | vulnerable |
| Ubuntu | jq | 25.10 | 1.8.1-3ubuntu1.1 | fixed |
| Ubuntu | jq | 26.04 | 1.8.1-3ubuntu1 | vulnerable |
| Ubuntu | jq | 26.04 | 1.8.1-4ubuntu1 | vulnerable |
| Ubuntu | jq | 26.04 | 1.8.1-4ubuntu2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | jq | source | sid | 1.8.1-5 | not yet assigned | Not reported | [1133921] |
| Debian | jq | source | forky | 1.8.1-5 | not yet assigned | Not reported | [1133921] |
| Debian | jq | source | trixie | 1.7.1-6+deb13u2 | not yet assigned | Not reported | [1133921] |
| Debian | jq | source | bookworm | 1.6-2.1+deb12u2 | not yet assigned | Not reported | [1133921] |
| Cpe | jq | cpe | Not reported | 1.7.1-3ubuntu0.24.04.2 | Not reported | Not reported | Not reported |
| Cpe | libjq-dev | cpe | Not reported | 1.7.1-3ubuntu0.24.04.2 | Not reported | Not reported | Not reported |
| Cpe | libjq1 | cpe | Not reported | 1.7.1-3ubuntu0.24.04.2 | Not reported | Not reported | Not reported |
| Cpe | jq | cpe | Not reported | 1.6-2.1+deb12u2 | Not reported | Not reported | Not reported |
| Alpine | jq | apk | 3.22 | 1.8.2-r0 | Not reported | ALPINE-CVE-2026-40164 | Not reported |
| Alpine | jq | apk | 3.23 | 1.8.2-r0 | Not reported | ALPINE-CVE-2026-40164 | Not reported |
| Alpine | jq | apk | 3.24 | 1.8.2-r0 | Not reported | ALPINE-CVE-2026-40164 | Not reported |
| Ubuntu | jq | deb | pro | 1.6-1ubuntu0.20.04.1+esm2 | Not reported | UBUNTU-CVE-2026-40164 | Not reported |
| Ubuntu | jq | deb | 22.04 | 1.6-2.1ubuntu3.2 | Not reported | UBUNTU-CVE-2026-40164 | Not reported |
| Ubuntu | jq | deb | 24.04 | 1.7.1-3ubuntu0.24.04.2 | Not reported | UBUNTU-CVE-2026-40164 | Not reported |
| Ubuntu | jq | deb | 25.10 | 1.8.1-3ubuntu1.1 | Not reported | UBUNTU-CVE-2026-40164 | Not reported |
| Ubuntu | jq | deb | 26.04 | 1.8.1-4ubuntu2 | Not reported | UBUNTU-CVE-2026-40164 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [jq]Fixed
Details (4)
1.6-2.1+deb12u2· amd64 · bookwormFixed · Fixed:
1.6-2.1+deb12u2nvd · jq · debian · bookworm; nvd · jq · debian · 12
1.6-2.1+deb12u2· arm64 · bookwormFixed · Fixed:
1.6-2.1+deb12u2nvd · jq · debian · bookworm; nvd · jq · debian · 12
1.6-2.1+deb12u2· amd64 · bookworm-securityFixed · Fixed:
1.6-2.1+deb12u2nvd · jq · debian · bookworm; nvd · jq · debian · 12
1.6-2.1+deb12u2· arm64 · bookworm-securityFixed · Fixed:
1.6-2.1+deb12u2nvd · jq · debian · bookworm; nvd · jq · debian · 12
- [libjq1]Fixed
Source package: [jq]
Details (4)
1.6-2.1+deb12u2· amd64 · bookwormFixed · Fixed:
1.6-2.1+deb12u2nvd · jq · debian · bookworm; nvd · jq · debian · 12
1.6-2.1+deb12u2· arm64 · bookwormFixed · Fixed:
1.6-2.1+deb12u2nvd · jq · debian · bookworm; nvd · jq · debian · 12
1.6-2.1+deb12u2· amd64 · bookworm-securityFixed · Fixed:
1.6-2.1+deb12u2nvd · jq · debian · bookworm; nvd · jq · debian · 12
1.6-2.1+deb12u2· arm64 · bookworm-securityFixed · Fixed:
1.6-2.1+deb12u2nvd · jq · debian · bookworm; nvd · jq · debian · 12
- [libjq-dev]Fixed
Source package: [jq]
Details (4)
1.6-2.1+deb12u2· amd64 · bookwormFixed · Fixed:
1.6-2.1+deb12u2nvd · jq · debian · bookworm; nvd · jq · debian · 12
1.6-2.1+deb12u2· arm64 · bookwormFixed · Fixed:
1.6-2.1+deb12u2nvd · jq · debian · bookworm; nvd · jq · debian · 12
1.6-2.1+deb12u2· amd64 · bookworm-securityFixed · Fixed:
1.6-2.1+deb12u2nvd · jq · debian · bookworm; nvd · jq · debian · 12
1.6-2.1+deb12u2· arm64 · bookworm-securityFixed · Fixed:
1.6-2.1+deb12u2nvd · jq · debian · bookworm; nvd · jq · debian · 12
[Debian 13 (Trixie)]
- [jq]Fixed
Details (5)
1.7.1-6+deb13u2· amd64 · trixieFixed · Fixed:
1.7.1-6+deb13u2nvd · jq · debian · 13
1.7.1-6+deb13u2· arm64 · trixieFixed · Fixed:
1.7.1-6+deb13u2nvd · jq · debian · 13
1.7.1-6+deb13u3· amd64 · trixie-security · Historical versionFixed · Fixed:
1.7.1-6+deb13u2nvd · jq · debian · 13
1.7.1-6+deb13u3· arm64 · trixie-securityFixed · Fixed:
1.7.1-6+deb13u2nvd · jq · debian · 13
1.7.1-6+deb13u4· amd64 · trixie-securityFixed · Fixed:
1.7.1-6+deb13u2nvd · jq · debian · 13
- [libjq1]Fixed
Source package: [jq]
Details (5)
1.7.1-6+deb13u2· amd64 · trixieFixed · Fixed:
1.7.1-6+deb13u2nvd · jq · debian · 13
1.7.1-6+deb13u2· arm64 · trixieFixed · Fixed:
1.7.1-6+deb13u2nvd · jq · debian · 13
1.7.1-6+deb13u3· amd64 · trixie-security · Historical versionFixed · Fixed:
1.7.1-6+deb13u2nvd · jq · debian · 13
1.7.1-6+deb13u3· arm64 · trixie-securityFixed · Fixed:
1.7.1-6+deb13u2nvd · jq · debian · 13
1.7.1-6+deb13u4· amd64 · trixie-securityFixed · Fixed:
1.7.1-6+deb13u2nvd · jq · debian · 13
- [libjq-dev]Fixed
Source package: [jq]
Details (5)
1.7.1-6+deb13u2· amd64 · trixieFixed · Fixed:
1.7.1-6+deb13u2nvd · jq · debian · 13
1.7.1-6+deb13u2· arm64 · trixieFixed · Fixed:
1.7.1-6+deb13u2nvd · jq · debian · 13
1.7.1-6+deb13u3· amd64 · trixie-security · Historical versionFixed · Fixed:
1.7.1-6+deb13u2nvd · jq · debian · 13
1.7.1-6+deb13u3· arm64 · trixie-securityFixed · Fixed:
1.7.1-6+deb13u2nvd · jq · debian · 13
1.7.1-6+deb13u4· amd64 · trixie-securityFixed · Fixed:
1.7.1-6+deb13u2nvd · jq · debian · 13
Observed:
References
- [https://access.redhat.com/errata/RHSA-2026:16252]
- [https://access.redhat.com/errata/RHSA-2026:16692]
- [https://access.redhat.com/errata/RHSA-2026:16693]
- [https://access.redhat.com/errata/RHSA-2026:18040]
- [https://access.redhat.com/errata/RHSA-2026:18042]
- [https://access.redhat.com/errata/RHSA-2026:18043]
- [https://access.redhat.com/errata/RHSA-2026:18044]
- [https://access.redhat.com/errata/RHSA-2026:18045]
- [https://access.redhat.com/errata/RHSA-2026:18046]
- [https://access.redhat.com/errata/RHSA-2026:18047]
- [https://access.redhat.com/errata/RHSA-2026:18048]
- [https://access.redhat.com/errata/RHSA-2026:19151]
- [https://access.redhat.com/errata/RHSA-2026:19365]
- [https://access.redhat.com/errata/RHSA-2026:23233]
- [https://access.redhat.com/errata/RHSA-2026:23245]
- [https://access.redhat.com/errata/RHSA-2026:25044]
- [https://access.redhat.com/errata/RHSA-2026:25096]
- [https://access.redhat.com/errata/RHSA-2026:25181]
- [https://access.redhat.com/errata/RHSA-2026:26528]
- [https://access.redhat.com/errata/RHSA-2026:26542]
- [https://access.redhat.com/errata/RHSA-2026:28887]
- [https://access.redhat.com/errata/RHSA-2026:30078]
- [https://access.redhat.com/errata/RHSA-2026:30087]
- [https://access.redhat.com/errata/RHSA-2026:30088]
- [https://access.redhat.com/errata/RHSA-2026:30089]
- [https://access.redhat.com/errata/RHSA-2026:34098]
- [https://access.redhat.com/errata/RHSA-2026:8579]
- [https://access.redhat.com/security/cve/CVE-2026-40164]
- [https://bugzilla.redhat.com/show_bug.cgi?id=2458084]
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_23873-1.json]
- [https://github.com/jqlang/jq/commit/0c7d133c3c7e37c00b6d46b658a02244fdd3c784]
- [https://github.com/jqlang/jq/security/advisories/GHSA-wwj8-gxm6-jc29]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-40164]
- [https://osv.dev/vulnerability/ALPINE-CVE-2026-40164]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-40164]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-40164]
- [https://security-tracker.debian.org/tracker/CVE-2026-40164]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40164.json]
- [https://ubuntu.com/security/notices/USN-8202-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1183.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]