SAML ePPN Attribute Validation Bypass in TÜBİTAK ULAKBİM's UlakPDF (CVE-2026-88907) | HOL Guard CVE

High · CVSS 7.4CVE-2026-88907

SAML ePPN Attribute Validation Bypass in TÜBİTAK ULAKBİM's UlakPDF

Answer in brief

CVE-2026-88907 records a High severity (CVSS 7.4) vulnerability in SAML ePPN Attribute Validation Bypass in TÜBİTAK ULAKBİM's UlakPDF. The current sources do not mark it as known exploited. The current feed maps TÜBİTAK ULAKBİM/UlakPDF (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 24, 2026Updated Sep 24, 2026Source checked Sep 24, 2026First seen by HOL Sep 24, 2026Material review Sep 24, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.4
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 7.4. 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 TÜBİTAK ULAKBİM/UlakPDF (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
TÜBİTAK ULAKBİM/UlakPDFgeneric	>=0 <=09092026	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for TÜBİTAK ULAKBİM/UlakPDF.
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 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 24, 2026

Sources and claim methodology

Source referencesiberguvenlik.gov.tr

Upstream source description

Incorrect Authorization vulnerability in TÜBİTAK ULAKBİM UlakPDF allows Authentication Bypass. This issue affects UlakPDF: through 09092026.

Quoted source text, attributed separately from HOL analysis.