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TI-2026-68927 Aliases CVE-2026-106447

Stack exhaustion in StableLib CBOR decoder causes denial of service

Priority HIGH 77CWE-674Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-674.

Summary

StableLib versions before 2.0.4 are affected, specifically the @stablelib/cbor decoder. The decoder recursively processes nested CBOR arrays, maps, and tags without enforcing a maximum nesting depth (CWE-674). An unauthenticated remote attacker can send deeply nested CBOR data that exhausts the JavaScript call stack, causing a decoding exception and potentially terminating a request worker or process.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00471 40th percentileScored 2026-11-07
Fix Fixed stablelib (StableLib): 2.0.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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

VendorProductAffected versionsFixed inStatusSource
StableLibstablelibbefore 2.0.42.0.4Patch availableCNA
  • stablelib VendorStableLib Affected before 2.0.4 Fixed in 2.0.4 Patch available CNA

Remediation

Upgrade StableLib to version 2.0.4, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA stablelib (StableLib) Fixed in 2.0.4

Timeline

  1. 2026-10-06 Threatist record created from CVE-2026-106447
  2. 2026-10-07 CISA SSVC decision points changed
  3. 2026-10-07 Priority changed: MEDIUM → HIGH

References

Other 3

  • TI-2026-68928 Prototype poisoning in StableLib CBOR decoding via __proto__ map keys CVSS 4.0HIGH 8.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences