CVE-2026-95521CWE-78command-injection

CVE-2026-95521

High · published September 24, 2026

CVSS v3.1
7.8
EPSS
1%
Percentile
47.0
In the wild
Unconfirmed
What it is

A command injection flaw was found in rpm. Installing or rebuilding a source RPM whose source or spec file basenames contain a %() macro construct causes rpm to execute an attacker-controlled shell command via popen() while relocating the source file list. This allows arbitrary command execution as the invoking (typically non-root) user, simply by installing, rebuilding, or otherwise processing an untrusted .src.rpm.

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00581 · 47.0th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-09-24T18:18Z
References (2)
https://access.redhat.com/security/cve/CVE-2026-95521 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2537812 · [email protected]
EPSS history
Timeline
  • 26 SEP 03:27Z
    EPSS moved — → 1%
    epss
  • 24 SEP 13:26Z
    Rpm: rpm: shell command injection via macro expansion of source/spec file basenames when installing a source rpm
    cvelistv5