ASN.1 TypeScript Library: Decoding an INTEGER could leak the underlying ArrayBuffer
Priority MEDIUM 45CWE-200Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-200.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00301 23rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| JonathanWilbur | asn1-ts | up to 11.0.5 | — | No fix listed | CNA |
- asn1-ts VendorJonathanWilbur Affected up to 11.0.5 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:jonathanwilbur:asn1-ts:*:*:*:*:*:node.js:*:* | before 11.0.6 | Vulnerable | JonathanWilbur |
- cpe:2.3:a:jonathanwilbur:asn1-ts:*:*:*:*:*:node.js:*:* Versions before 11.0.6 Vulnerable ·JonathanWilbur
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-27452
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences