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Back to active CVEs
High · CVSS 7.0CVE-2026-84233

Rpm: command execution via macro expansion in `rpmuncompress -x` for crafted `.gem` filenamesCVE-2026-84233

Answer in brief

CVE-2026-84233 records a High severity (CVSS 7.0) vulnerability in Rpm: command execution via macro expansion in `rpmuncompress -x` for crafted `.gem` filenames. The current sources do not mark it as known exploited. The current feed maps Red Hat/rpm (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 1, 2026Updated Oct 2, 2026Source checked Oct 16, 2026First seen by HOL Sep 1, 2026Material review Oct 2, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.0
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 7.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/rpm (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/rpmgeneric*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/rpm.
  2. 2Review the reported fix. Source-reported workaround: To mitigate this vulnerability, avoid using `rpmuncompress -x` (or a build workflow that invokes it via %{__rpmuncompress}) on `.gem` files from untrusted sources. Before extraction, rename `.gem` files to remove any RPM macro syntax (e.g., `%(...)`) or utilize an alternative extraction tool that does not expand RPM macros in filenames. In automated environments, implement validation to reject or sanitize untrusted archive names prior to processing

Evidence timeline and material changes

  1. Published upstream

    Sep 1, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 2, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 1, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
Upstream source description

A flaw was found in rpm. A local attacker could supply a specially crafted `.gem` filename containing RPM macro syntax. When a user or automated workflow invokes `rpmuncompress -x` on this file, the macro expansion occurs during command construction. This allows the attacker to execute arbitrary commands with the privileges of the invoking account, leading to a compromise of confidentiality, integrity, and availability.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • IBM i is Affected By An Improper Privilege Management VulnerabilitySame generic ecosystem
  • IBM i is Affected by a Denial of Service in Digital Certificate ManagerSame generic ecosystem
  • IBM Db2 Genius Hub Improper verification of cryptographic signatureSame generic ecosystem
  • WIMOOR through commit ec86736 Authentication Bypass via Forged X-USERINFO HeaderSame generic ecosystem
  • DataBuff ai-apm-web through 0.1.10 Authentication Bypass via Hardcoded HMAC SecretSame generic ecosystem
  • DataBuff ai-apm-web through 0.1.10 Hard-Coded Default Admin CredentialsSame generic ecosystem

Record context

Vulnerability class
Command Injection
EPSS
Not reported
CWE IDs
CWE-78
Source
CVE List V5
Source checked
Oct 16, 2026
References
3 linked sources
Open source record