Vulnerability in StableLib (CVE-2026-106447)
Summary
Vulnerability in StableLib (CVE-2026-106447). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
Summary
@stablelib/cbor decodes nested CBOR structures recursively and does not enforce a maximum nesting depth. A sufficiently deep attacker-controlled CBOR payload can therefore crash decoding with RangeError: Maximum call stack size exceeded.
Details
The decoder processes arrays, maps, and tagged values through recursive calls. Each nested container causes another descent into _decodeValue() until a leaf value is reached.
There is no depth limit, no iterative fallback, and no protection against pathological nesting. An attacker can therefore supply a payload made of thousands of nested arrays, maps, or tags and force the decoder to recurse until the JavaScript call stack is exhausted.
PoC
import { decode } from "@stablelib/cbor";
const depth = 12000;
const payload = new Uint8Array(depth + 1);
// Build [[[...[null]...]]]
payload.fill(0x81, 0, depth); // array(1)
payload[depth] = 0xf6; // null
decode(payload);
// RangeError: Maximum call stack size exceeded
Impact
Any application that decodes attacker-controlled CBOR can be forced into a reliable denial of service with a single crafted payload.
The immediate result is an exception during decoding. In services that do not catch that exception safely, the request fails and the worker or process handling the decode may terminate.
Solution
Upgrade to version 2.0.4. The stack is limited to 128 by default, but can be configured using the maxDepth option. Catch the `CBORMax…
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-106447 has been found in StableLib.
Risk of unauthorized operations or information disclosure.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "StableLib CVE-2026-106447" on the vendor's site.
CVE-2026-106447 (StableLib) — CWE-674
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-674) exists in StableLib.
Check the vendor advisory for the affected versions of StableLib.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'StableLib' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'StableLib' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
StableLibを grep し、稼働しているサービス・バージョンを把握する。 -
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- package github.com
- web github.com
- web security-advisories@github.com
- web github.com