dbcve.org
JsonwebtokenApplication · Auth0

CVE-2022-23539

HIGH · 8.1 CVSS v3.1 Published 2022-12-23
Fix available
A fix is available. Upgrade to after 8.5.1 or later.
See remediation →
87/100
Remediation priority · High
Remotely reachable Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Versions `<=8.5.1` of `jsonwebtoken` library could be misconfigured so that legacy, insecure key types are used for signature verification. For example, DSA keys could be used with the RS256 algorithm. You are affected if you are using an algorithm and a key type other than a combination listed in the GitHub Security Advisory as unaffected. This issue has been fixed, please update to version 9.0.0. This version validates for asymmetric key type and algorithm combinations. Please refer to the above mentioned algorithm / key type combinations for the valid secure configuration. After updating to version 9.0.0, if you still intend to continue with signing or verifying tokens using invalid key type/algorithm value combinations, you’ll need to set the `allowInvalidAsymmetricKeyTypes` option to `true` in the `sign()` and/or `verify()` functions.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
JsonwebtokenApplication
Affected:<= 8.5.1

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to a release after 8.5.1
Vendor patch github.com →
Recommended fix High confidence

9.0.0

  1. Check current jsonwebtoken version in your project by reviewing package.json or running npm list jsonwebtoken
  2. Update jsonwebtoken to version 9.0.0 or later by running: npm install jsonwebtoken@^9.0.0 or yarn add jsonwebtoken@^9.0.0
  3. Verify the upgrade was successful by checking the installed version with npm list jsonwebtoken
  4. Test your application thoroughly, particularly token signing and verification functionality, to ensure existing workflows still function correctly
  5. If your application was using invalid asymmetric key type/algorithm combinations (e.g., DSA with RS256), review whether these combinations are necessary; if so, set the allowInvalidAsymmetricKeyTypes option to true in sign() and/or verify() functions
Caveat Version 9.0.0 enforces validation of asymmetric key type and algorithm combinations; previously-allowed invalid combinations (e.g., DSA keys with RS256) are now blocked and require explicit allowInvalidAsymmetricKeyTypes option to function

Generated from the published advisory — verify against the referenced sources before acting.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-23539 in production — separate from our analysis above.

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  • Version or environment caveats, and links to real fixes
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