Vulnerability-Lookup

ubuntu-cve-2026-78367

Vulnerability from osv_ubuntu

Published

2026-08-24 14:17

Modified

2026-09-02 16:27

Summary

Details

A vulnerability was found in RPM's rpmbuild tarball processing. When processing a crafted source archive, the getTarSpec() function in tools/rpmbuild.cc passes an attacker-controlled tar archive member name to rpmExpand() as part of a %{basename:...} macro expression. A specially crafted .spec member name can therefore inject RPM macros, including Lua expressions, resulting in arbitrary code execution with the privileges of the user running rpmbuild. This can be exploited when a victim or automated build system processes an attacker-controlled source tarball using rpmbuild tarball mode (such as -ts, -ta, or -tb).

Severity

7.0 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-78367	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-78367	REPORT
	https://github.com/rpm-software-management/rpm/is…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "debugedit",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
          },
          {
            "binary_name": "librpm3",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
          },
          {
            "binary_name": "librpmbuild3",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
          },
          {
            "binary_name": "librpmio3",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
          },
          {
            "binary_name": "librpmsign1",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
          },
          {
            "binary_name": "python-rpm",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
          },
          {
            "binary_name": "rpm",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
          },
          {
            "binary_name": "rpm-common",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
          },
          {
            "binary_name": "rpm-i18n",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
          },
          {
            "binary_name": "rpm2cpio",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "rpm",
        "purl": "pkg:deb/ubuntu/rpm@4.11.1-3ubuntu0.1+esm1?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.11.1-2",
        "4.11.1-3",
        "4.11.1-3ubuntu0.1",
        "4.11.1-3ubuntu0.1+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "debugedit",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "librpm3",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "librpmbuild3",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "librpmio3",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "librpmsign3",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "python-rpm",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "python3-rpm",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "rpm",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "rpm-common",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "rpm-i18n",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "rpm2cpio",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "rpm",
        "purl": "pkg:deb/ubuntu/rpm@4.12.0.1+dfsg1-3ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.12.0.1+dfsg1-3build2",
        "4.12.0.1+dfsg1-3build3",
        "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "debugedit",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "librpm8",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "librpmbuild8",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "librpmio8",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "librpmsign8",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "python-rpm",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "python3-rpm",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "rpm",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "rpm-common",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "rpm-i18n",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "rpm2cpio",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "rpm",
        "purl": "pkg:deb/ubuntu/rpm@4.14.1+dfsg1-2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.12.0.2+dfsg1-2build2",
        "4.14.0+dfsg1-2",
        "4.14.1+dfsg1-2",
        "4.14.1+dfsg1-2ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "debugedit",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "librpm8",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "librpmbuild8",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "librpmio8",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "librpmsign8",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "python-rpm",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "python3-rpm",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "rpm",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "rpm-common",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "rpm-i18n",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "rpm2cpio",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "rpm",
        "purl": "pkg:deb/ubuntu/rpm@4.14.2.1+dfsg1-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.14.2.1+dfsg1-1",
        "4.14.2.1+dfsg1-1build1",
        "4.14.2.1+dfsg1-1build2",
        "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "librpm9",
            "binary_version": "4.17.0+dfsg1-4build1"
          },
          {
            "binary_name": "librpmbuild9",
            "binary_version": "4.17.0+dfsg1-4build1"
          },
          {
            "binary_name": "librpmio9",
            "binary_version": "4.17.0+dfsg1-4build1"
          },
          {
            "binary_name": "librpmsign9",
            "binary_version": "4.17.0+dfsg1-4build1"
          },
          {
            "binary_name": "python3-rpm",
            "binary_version": "4.17.0+dfsg1-4build1"
          },
          {
            "binary_name": "rpm",
            "binary_version": "4.17.0+dfsg1-4build1"
          },
          {
            "binary_name": "rpm-common",
            "binary_version": "4.17.0+dfsg1-4build1"
          },
          {
            "binary_name": "rpm-i18n",
            "binary_version": "4.17.0+dfsg1-4build1"
          },
          {
            "binary_name": "rpm2cpio",
            "binary_version": "4.17.0+dfsg1-4build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "rpm",
        "purl": "pkg:deb/ubuntu/rpm@4.17.0+dfsg1-4build1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.16.1.2+dfsg1-3ubuntu1",
        "4.16.1.2+dfsg1-3ubuntu3",
        "4.17.0+dfsg1-1",
        "4.17.0+dfsg1-3",
        "4.17.0+dfsg1-4",
        "4.17.0+dfsg1-4build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "librpm9t64",
            "binary_version": "4.18.2+dfsg-2.1build2"
          },
          {
            "binary_name": "librpmbuild9t64",
            "binary_version": "4.18.2+dfsg-2.1build2"
          },
          {
            "binary_name": "librpmio9t64",
            "binary_version": "4.18.2+dfsg-2.1build2"
          },
          {
            "binary_name": "librpmsign9t64",
            "binary_version": "4.18.2+dfsg-2.1build2"
          },
          {
            "binary_name": "python3-rpm",
            "binary_version": "4.18.2+dfsg-2.1build2"
          },
          {
            "binary_name": "rpm",
            "binary_version": "4.18.2+dfsg-2.1build2"
          },
          {
            "binary_name": "rpm-common",
            "binary_version": "4.18.2+dfsg-2.1build2"
          },
          {
            "binary_name": "rpm-i18n",
            "binary_version": "4.18.2+dfsg-2.1build2"
          },
          {
            "binary_name": "rpm2cpio",
            "binary_version": "4.18.2+dfsg-2.1build2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "rpm",
        "purl": "pkg:deb/ubuntu/rpm@4.18.2+dfsg-2.1build2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.18.0+dfsg-1build1",
        "4.18.0+dfsg-1build2",
        "4.18.2+dfsg-1",
        "4.18.2+dfsg-2",
        "4.18.2+dfsg-2.1build1",
        "4.18.2+dfsg-2.1build2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "librpm10",
            "binary_version": "6.0.1-1build1"
          },
          {
            "binary_name": "librpmbuild10",
            "binary_version": "6.0.1-1build1"
          },
          {
            "binary_name": "librpmio10",
            "binary_version": "6.0.1-1build1"
          },
          {
            "binary_name": "librpmsign10",
            "binary_version": "6.0.1-1build1"
          },
          {
            "binary_name": "python3-rpm",
            "binary_version": "6.0.1-1build1"
          },
          {
            "binary_name": "rpm",
            "binary_version": "6.0.1-1build1"
          },
          {
            "binary_name": "rpm-common",
            "binary_version": "6.0.1-1build1"
          },
          {
            "binary_name": "rpm2cpio",
            "binary_version": "6.0.1-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "rpm",
        "purl": "pkg:deb/ubuntu/rpm@6.0.1-1build1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.20.1+dfsg-3",
        "6.0.0-2",
        "6.0.1-1",
        "6.0.1-1build1"
      ]
    }
  ],
  "aliases": [],
  "details": "A vulnerability was found in RPM\u0027s rpmbuild tarball processing. When processing a crafted source archive, the getTarSpec() function in tools/rpmbuild.cc passes an attacker-controlled tar archive member name to rpmExpand() as part of a %{basename:...} macro expression. A specially crafted .spec member name can therefore inject RPM macros, including Lua expressions, resulting in arbitrary code execution with the privileges of the user running rpmbuild. This can be exploited when a victim or automated build system processes an attacker-controlled source tarball using rpmbuild tarball mode (such as -ts, -ta, or -tb).",
  "id": "UBUNTU-CVE-2026-78367",
  "modified": "2026-09-02T16:27:47Z",
  "published": "2026-08-24T14:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-78367"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-78367"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/rpm-software-management/rpm/issues/4314"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-78367"
  ]
}

CVE-2026-78367 (GCVE-0-2026-78367)

Vulnerability from cvelistv5 – Published: 2026-08-24 13:48 – Updated: 2026-09-04 11:13

Title

Rpm: rpmbuild gettarspec() crafted tar member name → macro injection

Summary

Severity

7 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-24 15:13 UTC

CWE

CWE-94 - Improper Control of Generation of Code ('Code Injection')

Assigner

redhat redhat root

References

3 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-78367	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2521857	issue-trackingx_refsource_REDHAT
https://github.com/rpm-software-management/rpm/is…

Impacted products

6 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat Hardened Images	cpe:/a:redhat:hummingbird:1

Date Public

2026-08-24 00:00

Credits

This issue was discovered by Sandipan Roy (Red Hat).

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-78367",
                "options": [
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                    "Exploitation": "poc"
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                  },
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                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-24T15:13:40.183552Z",
                "version": "2.0.3"
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        "providerMetadata": {
          "dateUpdated": "2026-08-24T15:14:08.592Z",
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      "descriptions": [
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          "value": "A vulnerability was found in RPM\u0027s rpmbuild tarball processing. When processing a crafted source archive, the getTarSpec() function in tools/rpmbuild.cc passes an attacker-controlled tar archive member name to rpmExpand() as part of a %{basename:...} macro expression. A specially crafted .spec member name can therefore inject RPM macros, including Lua expressions, resulting in arbitrary code execution with the privileges of the user running rpmbuild. This can be exploited when a victim or automated build system processes an attacker-controlled source tarball using rpmbuild tarball mode (such as -ts, -ta, or -tb)."
        }
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      "metrics": [
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          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-94",
              "description": "Improper Control of Generation of Code (\u0027Code Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T11:13:52.435Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "tags": [
            "vdb-entry",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/security/cve/CVE-2026-78367"
        },
        {
          "name": "RHBZ#2521857",
          "tags": [
            "issue-tracking",
            "x_refsource_REDHAT"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2521857"
        },
        {
          "url": "https://github.com/rpm-software-management/rpm/issues/4314"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-08-24T00:00:00.000Z",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2026-08-24T00:00:00.000Z",
          "value": "Made public."
        }
      ],
      "title": "Rpm: rpmbuild gettarspec() crafted tar member name \u2192 macro injection",
      "workarounds": [
        {
          "lang": "en",
          "value": "Do not process untrusted tarballs with rpmbuild -ta/-tb/-ts. Extract and inspect archives first (reject member names containing }, %, or {), or build from a reviewed .spec outside tarball mode. Prefer isolated builders (mock/container) for any untrusted packaging related work."
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-94: Improper Control of Generation of Code (\u0027Code Injection\u0027)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-78367",
    "datePublished": "2026-08-24T13:48:52.103Z",
    "dateReserved": "2026-08-24T12:52:02.839Z",
    "dateUpdated": "2026-09-04T11:13:52.435Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.