Allocation of Resources Without Limits or Throttling Affecting localstack package, versions <4.14.0-r1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CHAINGUARDLATEST-LOCALSTACK-15450053
- published11 Mar 2026
- disclosed3 Mar 2026
Introduced: 3 Mar 2026
CVE-2026-27932 (opens in a new tab)How to fix?
Upgrade Chainguard localstack to version 4.14.0-r1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream localstack package and not the localstack package as distributed by Chainguard.
See How to fix? for Chainguard relevant fixed versions and status.
joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. In 1.6.2 and earlier, a resource exhaustion vulnerability in joserfc allows an unauthenticated attacker to cause a Denial of Service (DoS) via CPU exhaustion. When the library decrypts a JSON Web Encryption (JWE) token using Password-Based Encryption (PBES2) algorithms, it reads the p2c (PBES2 Count) parameter directly from the token's protected header. This parameter defines the number of iterations for the PBKDF2 key derivation function. Because joserfc does not validate or bound this value, an attacker can specify an extremely large iteration count (e.g., 2^31 - 1), forcing the server to expend massive CPU resources processing a single token. This vulnerability exists at the JWA layer and impacts all high-level JWE and JWT decryption interfaces if PBES2 algorithms are allowed by the application's policy.