What’s Vulnerable › Vulnerabilities
CVE-2026-27452: ASN.1 TypeScript Library: Decoding an INTEGER could leak the underlying ArrayBuffer
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-02-21 · updated 2026-06-17
- Weakness: CWE-200
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
- JonathanWilbur asn1-ts: before 11.0.6 — fixed in 11.0.6
How to fix
Upgrade to a fixed version: JonathanWilbur asn1-ts 11.0.6. Check the vendor advisory for mitigations.
References
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