Ubuntu USN · USN-8202-2

jq vulnerabilities

Published: Tue, 28 Apr 2026 04:18

CVE-2026-33948CVE-2026-40164CVE-2026-32316CVE-2026-39979CVE-2026-33947CVE-2026-39956

Summary

Several security issues were fixed in jq.

Details

USN-8202-1 fixed vulnerabilities in jq. This update provides the corresponding update to Ubuntu 26.04 LTS. Original advisory details: It was discovered that jq did not correctly handle certain string concatenations. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-32316) It was discovered that jq did not correctly handle recursion in certain circumstances. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-33947) It was discovered that jq did not correctly handle improperly terminated strings. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-33948) It was discovered that jq did not correctly handle checking certain variable types. An attacker could possibly use this issue to cause a denial of service or leak sensitive information. (CVE-2026-39956) It was discovered that jq did not correctly handle certain string formatting. An attacker could possibly use this issue to leak sensitive information or cause a denial of service. (CVE-2026-39979) It was discovered that jq used a fixed seed for hash table operations. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-40164)

Recommended actions per Ubuntu release

StackPatch playbook auto-generated per release codename and per affected package.

Ubuntu resolute

jq→1.8.1-4ubuntu2apt_upgrade
Standard apt upgrade. Install 1.8.1-4ubuntu2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y jq
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
jq→1.8.1-4ubuntu2apt_upgrade
Standard apt upgrade. Install 1.8.1-4ubuntu2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y jq
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libjq-dev→1.8.1-4ubuntu2apt_upgrade
Standard apt upgrade. Install 1.8.1-4ubuntu2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libjq-dev
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libjq1→1.8.1-4ubuntu2apt_upgrade
Standard apt upgrade. Install 1.8.1-4ubuntu2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libjq1
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

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