Skip to content
OpenAdvisories
Critical · 9.2 CVE-2026-27452 EUVD-2026-7726

ASN.1 TypeScript Library: Decoding an INTEGER could leak the underlying ArrayBuffer

Published Feb 21, 2026 · Updated Feb 24, 2026 · Assigned by GitHub_M

Description

ASN.1 TypeScript ESM library, including codecs for Basic Encoding Rules (BER) and Distinguished Encoding Rules (DER). In versions 11.0.5 and below, in some cases, decoding an INTEGER could leak the underlying ArrayBuffer. This issue is expected to be fixed in version 11.0.6.

Affected products

VendorProductAffectedFixed
JonathanWilbur asn1-ts <= 11.0.5 —

References