Information disclosure via INTEGER decoding buffer leak
Published Feb 21, 2026 · Updated Feb 21, 2026
Information disclosure in Jonathan Wilbur asn1-ts 11.0.5 and earlier allows attackers to read an INTEGER's backing ArrayBuffer. The vendor has not published the exact decoder locus or the incorrect buffer operation that exposes the underlying allocation. Exposure requires a consuming application to decode attacker-controlled ASN.1 INTEGER data; the bounded consequence is disclosure of backing-buffer contents without reported modification or service interruption.
Summary
What happened
Information disclosure in Jonathan Wilbur asn1-ts 11.0.5 and earlier allows attackers to read an INTEGER's backing ArrayBuffer. The vendor has not published the exact decoder locus or the incorrect buffer operation that exposes the underlying allocation. Exposure requires a consuming application to decode attacker-controlled ASN.1 INTEGER data; the bounded consequence is disclosure of backing-buffer contents without reported modification or service interruption.
The record
- CVE
- CVE-2026-27452
- Published
- Feb 21, 2026
- Updated
- Feb 21, 2026
- Vendor
- Jonathan Wilbur
- Product
- asn1-ts
- Classifications
- CWE-125, CWE-200
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 21, 2026CVE publishedPublication date reported by the CVE source.
- Feb 21, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=<= 11.0.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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