Vulnerability-Lookup

ubuntu-cve-2026-84837

Vulnerability from osv_ubuntu

Published

2026-09-02 16:17

Modified

2026-09-16 11:43

Summary

Details

A flaw was found in rpm. An attacker can exploit a command injection vulnerability by influencing the path or filename of a tarball processed by rpmbuild -t* to include shell metacharacters. This is particularly relevant in automated build or continuous integration (CI) workflows that ingest externally supplied artifact names. Successful exploitation allows for arbitrary command execution with the privileges of the build user, which could lead to information disclosure or disruption of the build environment.

Severity

7.8 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-84837	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-84837	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2478408	REPORT
	https://access.redhat.com/security/cve/CVE-2026-84837	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 flaw was found in rpm. An attacker can exploit a command injection vulnerability by influencing the path or filename of a tarball processed by `rpmbuild -t*` to include shell metacharacters. This is particularly relevant in automated build or continuous integration (CI) workflows that ingest externally supplied artifact names. Successful exploitation allows for arbitrary command execution with the privileges of the build user, which could lead to information disclosure or disruption of the build environment.",
  "id": "UBUNTU-CVE-2026-84837",
  "modified": "2026-09-16T11:43:10Z",
  "published": "2026-09-02T16:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-84837"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-84837"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2478408"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-84837"
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  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-84837"
  ]
}

CVE-2026-84837 (GCVE-0-2026-84837)

Vulnerability from cvelistv5 – Published: 2026-09-02 15:12 – Updated: 2026-09-02 16:24

Title

Rpm: command injection in `rpmbuild -t*` (`gettarspec`) via unescaped tarball path

Summary

A flaw was found in rpm. An attacker can exploit a command injection vulnerability by influencing the path or filename of a tarball processed by `rpmbuild -t*` to include shell metacharacters. This is particularly relevant in automated build or continuous integration (CI) workflows that ingest externally supplied artifact names. Successful exploitation allows for arbitrary command execution with the privileges of the build user, which could lead to information disclosure or disruption of the build environment.

Severity

7.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-02 15:46 UTC

CWE

CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Assigner

redhat redhat root

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-84837	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2478408	issue-trackingx_refsource_REDHAT

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

2026-09-02 13:38

Credits

This issue was discovered by Found by AISLE in partnership with Red Hat.

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-84837",
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                "timestamp": "2026-09-02T15:46:29.235324Z",
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          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-78",
              "description": "Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-02T16:24:21.421Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "tags": [
            "vdb-entry",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/security/cve/CVE-2026-84837"
        },
        {
          "name": "RHBZ#2478408",
          "tags": [
            "issue-tracking",
            "x_refsource_REDHAT"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2478408"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-05-18T03:32:25.000Z",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2026-09-02T13:38:15.227Z",
          "value": "Made public."
        }
      ],
      "title": "Rpm: command injection in `rpmbuild -t*` (`gettarspec`) via unescaped tarball path",
      "workarounds": [
        {
          "lang": "en",
          "value": "To mitigate this issue, avoid using `rpmbuild -t*` with tarballs whose paths or filenames can be influenced by untrusted input. In automated build pipelines, ensure tarballs are staged into a trusted local directory and their names are normalized or validated to reject shell metacharacters before `rpmbuild` is invoked."
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-78: Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-84837",
    "datePublished": "2026-09-02T15:12:58.497Z",
    "dateReserved": "2026-09-02T11:56:41.213Z",
    "dateUpdated": "2026-09-02T16:24:21.421Z",
    "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.