HOMEVULNERABILITIESCVE-2026-27452
CRITICAL

CVE-2026-27452

CWE-200Published: February 21, 2026· Updated: Feb 23, 2026

9.2
CVSS v3.1
EPSS:0.04%probability of exploitation in 30 daysPercentile:12.8th

Official 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.

NVD Source

Technical Analysis

CVE-2026-27452 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeX
Impact
Confidentiality
Integrity
Availability
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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All References (1)

→
https://github.com/JonathanWilbur/asn1-ts/security/advisories/GHSA-h5rw-vxjr-8q79

Quick Facts

CVE IDCVE-2026-27452
CVSS Score9.2 / 10
SeverityCRITICAL
WeaknessCWE-200
CISA KEVNo
EPSS (30d)0.04%
PublishedFeb 21, 2026

Related CVEs (CWE-200)

CVE-2026-40965
10.0
CVE-2026-27604
10.0
CVE-2026-21515
9.9
CVE-2026-54305
9.9
CVE-2026-28213
9.8
CVE-2026-43992
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-27452 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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