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CVE-2026-33204

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:25de5224baa8e203f9d55f6a9a533c91ecd00cd975162de32633d2be0b3c23cf
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"simplejwt","vendor":"kelvinmo","versions":[{"status":"affected","version":"< 1.1.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6ac6f09ab1f9ed51c705f03d90fe2da88bc1eb1e43ba290933b65c22f72b9dd6 · sha256:cb6b9fdbe8fe27b2… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6ac6f09ab1f9ed51c705f03d90fe2da88bc1eb1e43ba290933b65c22f72b9dd6 · sha256:cb6b9fdbe8fe27b2… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6ac6f09ab1f9ed51c705f03d90fe2da88bc1eb1e43ba290933b65c22f72b9dd6 · sha256:cb6b9fdbe8fe27b2… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/kelvinmo/simplejwt/releases/tag/v1.1.1","tags":["x_refsource_MISC"],"url":"https://github.com/kelvinmo/simplejwt/releases/tag/v1.1.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6ac6f09ab1f9ed51c705f03d90fe2da88bc1eb1e43ba290933b65c22f72b9dd6 · sha256:cb6b9fdbe8fe27b2… · /containers/cna/references/1
{"name":"https://github.com/kelvinmo/simplejwt/security/advisories/GHSA-xw36-67f8-339x","tags":["x_refsource_CONFIRM"],"url":"https://github.com/kelvinmo/simplejwt/security/advisories/GHSA-xw36-67f8-339x"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6ac6f09ab1f9ed51c705f03d90fe2da88bc1eb1e43ba290933b65c22f72b9dd6 · sha256:cb6b9fdbe8fe27b2… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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