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

Vulnerability from cvelistv5 – Published: 2026-08-24 13:48 – Updated: 2026-10-14 02:28
VLAI
Title
Rpm: rpmbuild gettarspec() crafted tar member name → macro injection
Summary
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 (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 CNA under the redhat root
CNA scorecard B 82/100 over 1037 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Red Hat Red Hat Hardened Images Unaffected: 6.1.0-1.3.hum1 , < * (rpm)
    cpe:/a:redhat:hummingbird:1
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Red Hat Red Hat Enterprise Linux 10     cpe:/o:redhat:enterprise_linux:10
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Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
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Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
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Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
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Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
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Date Public
2026-08-24 00:00
Credits
This issue was discovered by Sandipan Roy (Red Hat).
Show details on NVD website
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              "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": "2026-10-14T02:28:34.256Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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