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Fencer Vulns
high 8.2

CVE-2025-49091 json

KDE Konsole before 25.04.2 allows remote code execution in a certain scenario.

published 2025-06-11 16 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-18073

cvss
8.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits
0
none known

Summary

KDE Konsole before 25.04.2 allows remote code execution in a certain scenario. It supports loading URLs from the scheme handlers such as a ssh:// or telnet:// or rlogin:// URL. This can be executed regardless of whether the ssh, telnet, or rlogin binary is available. In this mode, there is a code path where if that binary is not available, Konsole falls back to using /bin/bash for the given arguments (i.e., the URL) provided. This allows an attacker to execute arbitrary code.

Patch / fix

  • KDE Konsole 25.04.2
  • konsole Debian 12 4:22.12.3-1+deb12u1
  • konsole Debian 14, Debian 13 4:25.04.0-2

debian advisories DEBIAN-CVE-2025-49091

  • konsole Ubuntu Pro 16.04 LTS 4:15.12.3-0ubuntu1+esm1
  • konsole Ubuntu Pro 18.04 LTS 4:17.12.3-1ubuntu1+esm1
  • konsole Ubuntu Pro 20.04 LTS 4:19.12.3-0ubuntu1+esm1
  • konsole Ubuntu Pro 22.04 LTS 4:21.12.3-0ubuntu1+esm1
  • konsole Ubuntu Pro 24.04 LTS 4:23.08.5-0ubuntu4+esm1

ubuntu advisories UBUNTU-CVE-2025-49091

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • konsole RHEL 7 ELS 4.10.5-5.el7_9.1
  • konsole-part RHEL 7 ELS 4.10.5-5.el7_9.1

red hat advisories RHSA-2025:12346

  • konsole Arch Linux 25.04.2-1

arch linux advisories AVG-2897

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-49091 updated cvss 8.3

konsole: Konsole Remote Code Execution Vulnerability

  • Red Hat Enterprise Linux Server (v. 7 ELS) konsole 4.10.5-5.el7_9.1, konsole-part 4.10.5-5.el7_9.1 Red Hat Enterprise Linux Server Optional (v. 7 ELS) konsole 4.10.5-5.el7_9.1, konsole-part 4.10.5-5.el7_9.1
    fixed: vendor fix RHSA-2025:12346

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
16 mo ago

Exploit prediction

0.72% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.2 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:L

Affected products

  • KDE Konsole

Classification

Weakness
  • CWE-670 Always-Incorrect Control Flow Implementation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.