Vulnerability · Published Oct 6, 2026 · Assigned by GitHub_M

CVE-2026-106447StableLib: Stack exhaustion denial of service via deeply nested CBOR arrays, maps, or tags

High 8.7

In plain English

A high-severity security flaw in stablelib from StableLib. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)8.7High

Exploit odds (30 days)0.5%top 59.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	@stablelib/cbor	2.0.3	GHSA-5jg4-p4qw-cgfr

Affected products (as reported)

Vendor	Product	Versions
StableLib	stablelib	< 2.0.4

Weakness: CWE-674 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References

https://github.com/StableLib/stablelib/security/advisories/GHSA-5jg4-p4qw-cgfr x_refsource_CONFIRM
https://github.com/StableLib/stablelib/commit/0149e18d9d4736e22c257744ca945ebce7899a01 x_refsource_MISC
https://github.com/StableLib/stablelib/releases/tag/@stablelib/cbor@2.0.4 x_refsource_MISC