Security vulnerability: Foxit PDF Editor/Reader Fails to Detect Modifications to Signed Documents Displaying Newly Added Content (CVE-2026-91814) | HOL Guard CVE

Medium · CVSS 5.3CVE-2026-91814

Security vulnerability: Foxit PDF Editor/Reader Fails to Detect Modifications to Signed Documents Displaying Newly Added Content

Answer in brief

CVE-2026-91814 records a Medium severity (CVSS 5.3) vulnerability in Security vulnerability: Foxit PDF Editor/Reader Fails to Detect Modifications to Signed Documents Displaying Newly Added Content. The current sources do not mark it as known exploited. The current feed maps Foxit Software Inc./Foxit PDF Editor (generic), Foxit Software Inc./Foxit PDF Reader (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 23, 2026Source checked Sep 23, 2026First seen by HOL Sep 23, 2026Material review Sep 23, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.3
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

CVSS is 5.3. 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 Foxit Software Inc./Foxit PDF Editor (generic), Foxit Software Inc./Foxit PDF Reader (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Foxit Software Inc./Foxit PDF Editorgeneric	Versions 2026.2 and earlier \|\| Versions 14.0.7 and earlier \|\| Versions 13.2.6 and earlier	Not reported
Foxit Software Inc./Foxit PDF Readergeneric	Versions 2026.2 and earlier	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Foxit Software Inc./Foxit PDF Editor, Foxit Software Inc./Foxit PDF Reader.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

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

Sources and claim methodology

Source referencefoxit.com

Upstream source description

A signature validation vulnerability exists in Foxit PDF Editor/Reader’s handling of incrementally updated PDF documents. Changes to visible document content may not invalidate the existing signature, allowing attackers to alter signed content and potentially carry out content spoofing while the document continues to appear validly signed.

Quoted source text, attributed separately from HOL analysis.