CISA ADP Vulnrichment

Answer in brief

CVE-2026-96807 records a Medium severity (CVSS 4.0) vulnerability in CISA ADP Vulnrichment. The current sources do not mark it as known exploited. The current feed maps Flatpak/Flatpak (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 23, 2026Updated Sep 26, 2026Source checked Sep 27, 2026First seen by HOL Sep 23, 2026Material review Sep 26, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 4.0
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 4.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Flatpak/Flatpak (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Flatpak/Flatpakgeneric	>=0 <1.18.1	1.18.1

Recommended response

Check inventory. Check lockfiles and deployed manifests for Flatpak/Flatpak.
Review the reported fix. Source-reported solution: The issue has been fixed in version 1.18.1 by commits: * e13dfed https://github.com/flatpak/flatpak/commit/e13dfeda330625d2fecc3a54672dfd4dc9c83a5c "common: Fix return value and typos in flatpak_switch_symlink_and_remove" * f6c8fb5 https://github.com/flatpak/flatpak/commit/f6c8fb5fdb3737e2f45068afe12c4bf1d808fd55 "common: Use fd-based operations in flatpak_switch_symlink_and_remove" * 76c9296 https://github.com/flatpak/flatpak/commit/76c9296b6780ca67f44cf67f0823f086d692a592 "run: Harden regenerate_ld_cache against symlink attacks" For LTS operating system distributions, backports of these changes are available in the flatpak-1.16.x branch. Please note that cherry-picked libglnx changes "chase: Add internal glnx_chaseat_full for a strategic callback" and "chase: Add glnx_chase_and_mkdirat" are also required.

Evidence timeline and material changes

Published upstream
Sep 23, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 23, 2026

Sources and claim methodology

GitHub security advisorygithub.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.