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CVE-2026-96807: flatpak UNIX Symbolic Link (Symlink) Following

CVSS: 4.0v3.1MediumAwaiting analysis
AliasesUBUNTU-CVE-2026-96807DEBIAN-CVE-2026-96807
Published 23-09-2026Last modified 26-09-2026
Open JSON

Vulnerability summary

CVE-2026-96807 is a medium (CVSS 4.0) UNIX Symbolic Link (Symlink) Following vulnerability in flatpak. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.8% of scored vulnerabilities.

Overall risk
16/100
0100
Low · default modelHow is this calculated?
CVSS score
4.0/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.12%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
SUSE-SU-2026:4610-1

Timeline

  1. 23-09-2026
    PublishedVulnerability first disclosed.
  2. 26-09-2026
    Last modifiedVulnerability information updated.

Description

In Flatpak before 1.18.1, a malicious sandboxed app can replace ~/.var/app/$appid/.ld.so with a symlink, causing regenerate_ld_cache to write files at an arbitrary location. The filenames and content are not attacker controlled, making this hard to exploit.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.12%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

24-09-202621-10-2026
EPSS score
0.12%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • flatpakAll versions (No fix recorded) | < 1.16.6-1~deb13u2 | < 1.18.1-1
Flatpak1 product
Ubuntu1 product
  • flatpakAll versions (No fix recorded)

3 vendors · 3 products

References

4 links