A flaw was found in rpmuncompress. (CVE-2026-84838)
Description
A command injection vulnerability exists in the rpmuncompress utility. This flaw allows a local attacker to execute arbitrary commands by processing specially crafted archive filenames containing shell metacharacters that are not properly escaped. Exploitation requires user interaction, such as invoking rpmuncompress on a malicious file. The vulnerability impacts confidentiality, integrity, and availability of data accessible to the invoking user.
CVSS v3.1
Score 7.8high
Affected software
pkg:deb/ubuntu/rpm?arch=source&distro=trusty/esmpkg:deb/ubuntu/rpm?arch=source&distro=esm-apps/xenialpkg:deb/ubuntu/rpm?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/rpm?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/rpm?arch=source&distro=jammypkg:deb/ubuntu/rpm?arch=source&distro=noblepkg:deb/ubuntu/rpm?arch=source&distro=stonkingpkg:deb/ubuntu/rpm?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-84838 describes a command injection vulnerability in rpmuncompress. The issue arises because rpmuncompress does not properly escape shell metacharacters in archive filenames before passing them to shell command strings. A local attacker can exploit this by crafting a malicious archive filename and tricking a user or automated workflow into invoking rpmuncompress on it, leading to arbitrary command execution with the privileges of the invoking user.
Potential Impact
Successful exploitation allows a local attacker to execute arbitrary commands, potentially compromising the confidentiality, integrity, and availability of data accessible to the user running rpmuncompress. This could lead to unauthorized data access, modification, or denial of service affecting the local system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is available, avoid invoking rpmuncompress on untrusted or suspicious archive files to prevent exploitation.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-84838
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.10","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad3f5582cdf04f65665e958
Added to database: 10/17/2026, 22:23:20 UTC
Last enriched: 10/17/2026, 23:27:45 UTC
Last updated: 10/17/2026, 23:27:45 UTC
Views: 3
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.