CVE-2026-118040

High

Description

In Progress® Telerik® Document Processing Libraries prior to version 2026.3.1027, improper verification of cryptographic signatures and improper certificate validation in RadPdfProcessing digital signature validation allow an unauthenticated attacker to cause signature validation to report forged content as unmodified and its signing certificate as valid via a crafted signed PDF document.

SeverityHigh

CVSS7.5

Exploit probability—

ProductTelerik Document Processing Libraries

PublishedOct 28, 2026

First seenNov 6, 2026

Weakness typeCWE-295CWE-295 CWE-347CWE-347

How to fix

Update

Progress Software Telerik Document Processing Libraries2026.3.1027 or later

Vendor advisories

docs.telerik.com/devtools/document-processing/knowledge-base/kb-security-improper-verification-of-cryptographic-signature-cve-2026-118040

Affected products

Product	Affected versions	Fixed in
Progress Software Telerik Document Processing Libraries	v < 2026.3.1027	2026.3.1027

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