CVE-2026-84838

HIGH
MEDIUM Priority: 0.09 BB Relevance: 41/100
Published: 2026-09-02 Modified: 2026-11-03 First seen: 2026-11-03 Status: active

Attack Surface

Low Complexity No Auth Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Local
AC: Low
PR: None
UI: Required
S: Unchanged
C: High
I: High
A: High

Description

A flaw was found in rpmuncompress. This command injection vulnerability allows a local attacker to execute arbitrary commands. This occurs when rpmuncompress processes a specially crafted archive filename containing shell metacharacters, which are not properly escaped before being passed to shell command strings. Successful exploitation requires user interaction, where a user or automated workflow invokes rpmuncompress on the malicious file, leading to high impact on the confidentiality, integrity, and availability of data accessible to the invoking user.

References & Advisories (3)

https://access.redhat.com/errata/RHSA-2026:82378
vendor-advisory x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2462222
issue-tracking x_refsource_REDHAT

Bug Bounty Relevance

41 / 100
✓ No authentication
✓ Low complexity

CVSS Score

7.8 / 10.0 v3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

1.10%
Raw Score 0.011050
Percentile 65.9%
Date 2026-11-05

EPSS Trend

2026-11-05
0.01105
2026-11-04
0.01105
2026-11-03
0.01105
2026-11-02
0.01105

Intelligence Sources

mitre ref →