Allocation of Resources Without Limits or Throttling Affecting joserfc package, versions [,1.6.7)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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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- published18 Jun 2026
- disclosed18 Jun 2026
- creditHunSec
Introduced: 18 Jun 2026
CVE-2026-48990 (opens in a new tab)How to fix?
Upgrade joserfc to version 1.6.7 or higher.
Overview
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the deserialization process of RFC7797 JWS payloads with b64=false. An attacker can cause resource exhaustion by submitting a payload that exceeds the intended size limits, bypassing the JWSRegistry.max_payload_length check during deserialization.