CVE-2026-42095: KDE Arianna · Missing Authentication
Affects KDE AriannaSource CVE Database V5
Not known to be exploited · CVSS 4.0 Medium : upgrade to 26.04.1 when convenient.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 26.04.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 24 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade KDE Arianna to 26.04.1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| KDEArianna | Affected
| Fixed in
|
AI-suggested
If you cannot patch yet, restrict access to the bookserver component to trusted users only and monitor for suspicious local activity. Avoid exposing the vulnerable service to untrusted networks.
Description
CVE-2026-42095 is a medium severity vulnerability in KDE Arianna's bookserver component before version 26.04.1. It allows attackers to read files over a socket connection by guessing a URL due to missing authentication on a critical function. The vulnerability does not require user interaction or privileges and has a low complexity for exploitation. There is no confirmed patch or official remediation available at this time.
References
- github.com/KDE/arianna/tags (opens in a new tab)
- kde.org/info/security/advisory-20260424-1.txt (opens in a new tab)
- invent.kde.org/graphics/arianna/-/commit/485851d25de279a9d2711d3780443530e9851300 (opens in a new tab)
- invent.kde.org/graphics/arianna/-/commit/3cd56fce103ab62887c5592827d78a1197cd926a (opens in a new tab)