Inadequate Encryption Strength Affecting joserfc package, versions [,1.6.8)
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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- published3 Jul 2026
- disclosed2 Jul 2026
- credittonghuaroot
Introduced: 2 Jul 2026
CVE-2026-49852 (opens in a new tab)How to fix?
Upgrade joserfc to version 1.6.8 or higher.
Overview
Affected versions of this package are vulnerable to Inadequate Encryption Strength in the verify process. An attacker can gain unauthorized access and forge arbitrary claims by submitting tokens signed with an empty or null key, which are incorrectly accepted as valid signatures. This is only exploitable if the verification key is set to an empty string or None, such as when a secret is missing from configuration or environment variables.