CVE-2026-34079: Flatpak · Prior to 1.16.4, the caching for ld.so removes outdated cache files without properly checking that the app controlled path to the outdated cache is
Affects flatpakSource GCVE Database
Not known to be exploited · CVSS 7.5 Medium · fixed in 1.16.4 : update flatpak when convenient.
Data as of 25 Oct 2026, 19:02 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 25% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 1.16.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 7 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 2026-10-25.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu:18.04:LTSflatpakpkg:deb/ubuntu/flatpak?arch=source&distro=bionicOther threats | Affected
| Fixed in– |
Ubuntu:Pro:20.04:LTSflatpakpkg:deb/ubuntu/flatpak?arch=source&distro=esm-apps/focalOther threats | Affected
| Fixed in– |
Ubuntu:Pro:22.04:LTSflatpakpkg:deb/ubuntu/flatpak?arch=source&distro=esm-apps/jammyOther threats | Affected
| Fixed in– |
Ubuntu:Pro:24.04:LTSflatpakpkg:deb/ubuntu/flatpak?arch=source&distro=esm-apps/nobleOther threats | Affected
| Fixed in– |
Ubuntu:25.10flatpakpkg:deb/ubuntu/flatpak?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
This vulnerability is fixed in Flatpak version 1.16.4. Users and administrators should upgrade to version 1.16.4 or later to remediate this issue. No other mitigations are indicated by the vendor advisory.
Description
Flatpak versions prior to 1.16.4 contain a vulnerability in the ld.so caching mechanism where outdated cache files are removed without properly verifying that the path to the outdated cache is within the cache directory. This flaw allows Flatpak applications to delete arbitrary files on the host system. The issue is resolved in Flatpak version 1.16.4.