CVE-2026-33204SimpleJWT is a simple JSON web token library written in PHP.
Updated under an hour ago ()
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It affects kelvinmo simplejwt. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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SimpleJWT is a simple JSON web token library written in PHP. Prior to version 1.1.1, an unauthenticated attacker can perform a Denial of Service via JWE header tampering when PBES2 algorithms are used. Applications that call JWE::decrypt() on attacker-controlled JWEs using PBES2 algorithms are affected. This issue has been patched in version 1.1.1.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-400
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
kelvinmo simplejwt kelvinmo:simplejwt | before 1.1.1 | NVD |
References
- https://github.com/kelvinmo/simplejwt/releases/tag/v1.1.1product, release-notes
- https://github.com/kelvinmo/simplejwt/security/advisories/GHSA-xw36-67f8-339xexploit, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.