All vulnerabilities
CVE-2026-106447GHSA-5jg4-p4qw-cgfr

StableLib: Stack exhaustion denial of service via deeply nested CBOR arrays, maps, or tags

StableLib stablelibnpmLibraries & packages
Open in ThreatlineRecord JSON
CVSS
8.7High
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 7 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.37%Chance of exploitation activity in the next 30 days, higher than 29% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in2.0.3Fixed versionOSV
Published6 Oct 2026Updated 7 Oct 2026CVE List

What fixes it

  • 2.0.3@stablelib/cbor, npmOSVnpm install @stablelib/cbor@2.0.3

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

StableLib is a stable library of useful TypeScript and JavaScript code. Prior to 2.0.4, the @stablelib/cbor decoder recursively processes nested CBOR arrays, maps, and tags through _decodeValue() without enforcing a maximum nesting depth. A sufficiently deep structure exhausts the JavaScript call stack, causing a decoding exception and potentially terminating an uncaught request worker or process. This issue is fixed in version 2.0.4.

Text from CVE List

Affected versions 2

  • stablelibaffected: < 2.0.4CVE List
  • @stablelib/cbor, npmfrom first release, fixed in 2.0.3OSV

References 3