Vulnerability-Lookup

usn-8202-3

Vulnerability from osv_ubuntu

Published

2026-05-21 05:15

Modified

2026-06-30 15:55

Summary

jq regression

Details

USN-8202-1 fixed vulnerabilities in jq. The update caused a regression for Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. This update fixes the problem.

We apologize for the inconvenience.

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. This issue was addressed in Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 25.10. (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. This issue was addressed in Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 25.10. (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. This issue was addressed in Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 25.10. (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. This issue was addressed in Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 25.10. (CVE-2026-40164)

References

URL

Type

	https://ubuntu.com/security/notices/USN-8202-3	ADVISORY
	https://ubuntu.com/security/CVE-2026-40164	REPORT
	https://bugs.launchpad.net/ubuntu/+source/jq/+bug…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-40164",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "jq",
            "binary_version": "1.5+dfsg-2ubuntu0.1~esm3"
          },
          {
            "binary_name": "libjq1",
            "binary_version": "1.5+dfsg-2ubuntu0.1~esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "jq",
        "purl": "pkg:deb/ubuntu/jq@1.5+dfsg-2ubuntu0.1~esm3?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.5+dfsg-2ubuntu0.1~esm3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.5+dfsg-2",
        "1.5+dfsg-2ubuntu0.1~esm1",
        "1.5+dfsg-2ubuntu0.1~esm2"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-40164",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "jq",
            "binary_version": "1.6-1ubuntu0.20.04.1+esm3"
          },
          {
            "binary_name": "libjq1",
            "binary_version": "1.6-1ubuntu0.20.04.1+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "jq",
        "purl": "pkg:deb/ubuntu/jq@1.6-1ubuntu0.20.04.1+esm3?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6-1ubuntu0.20.04.1+esm3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.5+dfsg-2build1",
        "1.6-1",
        "1.6-1ubuntu0.20.04.1",
        "1.6-1ubuntu0.20.04.1+esm1",
        "1.6-1ubuntu0.20.04.1+esm2"
      ]
    }
  ],
  "aliases": [],
  "details": "USN-8202-1 fixed vulnerabilities in jq. The update caused a regression\nfor Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. This update fixes the problem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that jq did not correctly handle certain string\n concatenations. An attacker could possibly use this issue to cause a denial\n of service or execute arbitrary code. This issue was addressed in Ubuntu\n 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu\n 24.04 LTS and Ubuntu 25.10. (CVE-2026-32316)\n\n It was discovered that jq did not correctly handle recursion in certain\n circumstances. An attacker could possibly use this issue to cause a denial\n of service. (CVE-2026-33947)\n\n It was discovered that jq did not correctly handle improperly terminated\n strings. An attacker could possibly use this issue to cause a denial of\n service or execute arbitrary code. This issue was addressed in Ubuntu 16.04\n LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS\n and Ubuntu 25.10. (CVE-2026-33948)\n\n It was discovered that jq did not correctly handle checking certain\n variable types. An attacker could possibly use this issue to cause a denial\n of service or leak sensitive information. This issue was addressed in\n Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS,\n Ubuntu 24.04 LTS and Ubuntu 25.10. (CVE-2026-39956)\n\n It was discovered that jq did not correctly handle certain string\n formatting. An attacker could possibly use this issue to leak sensitive\n information or cause a denial of service. (CVE-2026-39979)\n\n It was discovered that jq used a fixed seed for hash table operations. An\n attacker could possibly use this issue to cause a denial of service. This\n issue was addressed in Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04\n LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 25.10. (CVE-2026-40164)",
  "id": "USN-8202-3",
  "modified": "2026-06-30T15:55:18Z",
  "published": "2026-05-21T05:15:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8202-3"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-40164"
    },
    {
      "type": "REPORT",
      "url": "https://bugs.launchpad.net/ubuntu/+source/jq/+bug/2152052"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "jq regression",
  "upstream": [
    "UBUNTU-CVE-2026-40164"
  ]
}

ubuntu-cve-2026-40164

Vulnerability from osv_ubuntu

Published

2026-04-14 00:16

Modified

2026-06-30 16:20

Summary

Details

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.

Severity

7.5 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

7.5 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-40164	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-40164	REPORT
	https://github.com/jqlang/jq/security/advisories/…	REPORT
	https://github.com/jqlang/jq/commit/0c7d133c3c7e3…	REPORT
	https://ubuntu.com/security/notices/USN-8202-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8202-2	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "jq",
            "binary_version": "1.3-1.1ubuntu1.1+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "jq",
        "purl": "pkg:deb/ubuntu/jq@1.3-1.1ubuntu1.1+esm4?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2-8",
        "1.3-1",
        "1.3-1.1ubuntu1",
        "1.3-1.1ubuntu1.1",
        "1.3-1.1ubuntu1.1+esm3",
        "1.3-1.1ubuntu1.1+esm4"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "jq",
            "binary_version": "1.5+dfsg-1ubuntu0.1+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "jq",
        "purl": "pkg:deb/ubuntu/jq@1.5+dfsg-1ubuntu0.1+esm4?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.5+dfsg-1ubuntu0.1+esm4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4-2.1",
        "1.5+dfsg-1",
        "1.5+dfsg-1ubuntu0.1",
        "1.5+dfsg-1ubuntu0.1+esm2",
        "1.5+dfsg-1ubuntu0.1+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "jq",
            "binary_version": "1.5+dfsg-2ubuntu0.1~esm2"
          },
          {
            "binary_name": "libjq1",
            "binary_version": "1.5+dfsg-2ubuntu0.1~esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "jq",
        "purl": "pkg:deb/ubuntu/jq@1.5+dfsg-2ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.5+dfsg-2ubuntu0.1~esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.5+dfsg-2",
        "1.5+dfsg-2ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "jq",
            "binary_version": "1.6-1ubuntu0.20.04.1+esm2"
          },
          {
            "binary_name": "libjq1",
            "binary_version": "1.6-1ubuntu0.20.04.1+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "jq",
        "purl": "pkg:deb/ubuntu/jq@1.6-1ubuntu0.20.04.1+esm2?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6-1ubuntu0.20.04.1+esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.5+dfsg-2build1",
        "1.6-1",
        "1.6-1ubuntu0.20.04.1",
        "1.6-1ubuntu0.20.04.1+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "jq",
            "binary_version": "1.6-2.1ubuntu3.2"
          },
          {
            "binary_name": "libjq1",
            "binary_version": "1.6-2.1ubuntu3.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "jq",
        "purl": "pkg:deb/ubuntu/jq@1.6-2.1ubuntu3.2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6-2.1ubuntu3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.6-2.1ubuntu2",
        "1.6-2.1ubuntu3",
        "1.6-2.1ubuntu3.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "jq",
            "binary_version": "1.7.1-3ubuntu0.24.04.2"
          },
          {
            "binary_name": "libjq1",
            "binary_version": "1.7.1-3ubuntu0.24.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "jq",
        "purl": "pkg:deb/ubuntu/jq@1.7.1-3ubuntu0.24.04.2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.7.1-3ubuntu0.24.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.6-3",
        "1.7-1",
        "1.7.1-2",
        "1.7.1-3",
        "1.7.1-3build1",
        "1.7.1-3ubuntu0.24.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "jq",
            "binary_version": "1.8.1-3ubuntu1.1"
          },
          {
            "binary_name": "libjq1",
            "binary_version": "1.8.1-3ubuntu1.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "jq",
        "purl": "pkg:deb/ubuntu/jq@1.8.1-3ubuntu1.1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.8.1-3ubuntu1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.7.1-3ubuntu1",
        "1.7.1-6ubuntu1",
        "1.8.1-3ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "jq",
            "binary_version": "1.8.1-4ubuntu2"
          },
          {
            "binary_name": "libjq1",
            "binary_version": "1.8.1-4ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "jq",
        "purl": "pkg:deb/ubuntu/jq@1.8.1-4ubuntu2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.8.1-4ubuntu2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.1-3ubuntu1",
        "1.8.1-4ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "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(n\u00b2) 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.",
  "id": "UBUNTU-CVE-2026-40164",
  "modified": "2026-06-30T16:20:58Z",
  "published": "2026-04-14T00:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-40164"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-40164"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/jqlang/jq/security/advisories/GHSA-wwj8-gxm6-jc29"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/jqlang/jq/commit/0c7d133c3c7e37c00b6d46b658a02244fdd3c784"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8202-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8202-2"
    }
  ],
  "related": [
    "USN-8202-1",
    "USN-8202-2"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-40164"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

usn-8202-3

Vulnerability from osv_ubuntu

ubuntu-cve-2026-40164

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature