PatchTheCVECVE-2021-29446: jose-node-cjs-runtime is an npm package which provides a number of cryptographic functions
CVE-2021-29446 is a medium-severity flaw (CVSS 5.9) affecting jose-node-cjs-runtime. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
jose-node-cjs-runtime is an npm package which provides a number of cryptographic functions. In versions prior to 3.11.4 the AES_CBC_HMAC_SHA2 Algorithm (A128CBC-HS256, A192CBC-HS384, A256CBC-HS512) decryption would always execute both HMAC tag verification and CBC decryption, if either failed `JWEDecryptionFailed` would be thrown. But a possibly observable difference in timing when padding error would occur while decrypting the ciphertext makes a
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.9 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.1% (top 35%) |
| CISA exploited list | No |
| Weakness | CWE-203 |
| Published | 2021-04-16 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-29446?
jose-node-cjs-runtime: upgrade to 3.11.4. Exact commands for each OS are on this page.
Is CVE-2021-29446 being exploited?
CVE-2021-29446 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-29446 affect?
CVE-2021-29446 affects jose-node-cjs-runtime. Severity is medium (CVSS 5.9). jose-node-cjs-runtime is an npm package which provides a number of cryptographic functions. In versions prior to 3.11.4 the AES_CBC_HMAC_SHA2 Algorithm (A128CBC-HS256, A192CBC-HS384, A256CBC-HS512) decryption would always execute both HMAC
How urgent is CVE-2021-29446?
Priority 42/100. Remotely exploitable, no login, no user action
Software pages
Related CVEs
- CVE-2021-29445 MEDIUM 5.9 UPGRADE jose-node-esm-runtime is an npm package which provides a number of cryptographic functions
- CVE-2021-29444 MEDIUM 5.9 UPGRADE jose-browser-runtime is an npm package which provides a number of cryptographic functions