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CVE-2026-27932

joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. In 1.6.2 and earlier, a resource exhaustion vulnerability in joserfc allows an unauthenticated attacker to cause a Denial of Service (DoS) via CPU exhaustion. When the library decrypts a JSON Web Encryption (JWE) token using Password-Based Encryption (PBES2) algorithms, it reads the p2c (PBES2 Count) parameter directly from the token's protected header. This parameter defin
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3c324da6d760424df037043d84bd709456486602e822ccec5f36da4ef09d64ae
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"joserfc","vendor":"authlib","versions":[{"status":"affected","version":"<= 1.6.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:944668dde2f0eadd83ed2bdf4719b247207484c7c6a68ed183e61930c4f64851 · sha256:4921b41034cb13e1… · /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:v2:944668dde2f0eadd83ed2bdf4719b247207484c7c6a68ed183e61930c4f64851 · sha256:4921b41034cb13e1… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:944668dde2f0eadd83ed2bdf4719b247207484c7c6a68ed183e61930c4f64851 · sha256:4921b41034cb13e1… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/authlib/joserfc/commit/696a9611ab982c45ee2190ed79ca8e1d8e09398f","tags":["x_refsource_MISC"],"url":"https://github.com/authlib/joserfc/commit/696a9611ab982c45ee2190ed79ca8e1d8e09398f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:944668dde2f0eadd83ed2bdf4719b247207484c7c6a68ed183e61930c4f64851 · sha256:4921b41034cb13e1… · /containers/cna/references/1
{"name":"https://github.com/authlib/joserfc/security/advisories/GHSA-w5r5-m38g-f9f9","tags":["x_refsource_CONFIRM"],"url":"https://github.com/authlib/joserfc/security/advisories/GHSA-w5r5-m38g-f9f9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:944668dde2f0eadd83ed2bdf4719b247207484c7c6a68ed183e61930c4f64851 · sha256:4921b41034cb13e1… · /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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