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CVE-2026-102266 PyJWK accepts empty HMAC keys, bypassing PyJWT's empty-key validation

🗓️ 28 Sep 2026 20:21:26Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 57 Views

PyJWT 2.13.0-2.13.x PyJWK accepts empty HMAC keys allowing forged authenticated claims.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
bdu_fstec
BDU FSTEC
PyJWT HMAC Algorithm Unauthorized Access
2 Oct 202600:00
–bdu_fstec
cbl_mariner
CBLMariner
CVE-2026-102266 affecting package python-jwt for versions less than 2.15.1-1
6 Oct 202618:59
–cbl_mariner
cgr
Chainguard
CVE-2026-102266 vulnerabilities
30 Sep 202620:54
–cgr
circl
Circl
CVE-2026-102266
11 Sep 202614:20
–circl
cve
CVE
CVE-2026-102266
28 Sep 202620:21
–cve
debiancve
Debian CVE
CVE-2026-102266
28 Sep 202620:21
–debiancve
euvd
EUVD
EUVD-2026-88484
28 Sep 202620:21
–euvd
github
Github Security Blog
PyJWT: PyJWK accepts empty HMAC keys, bypassing PyJWT's empty-key validation
29 Sep 202623:43
–github
mend
Mend
CVE-2026-102266
28 Sep 202620:21
–mend
mscve
Microsoft CVE
PyJWK accepts empty HMAC keys, bypassing PyJWT's empty-key validation
1 Oct 202608:17
–mscve
Rows per page
[
  {
    "vendor": "jpadilla",
    "product": "pyjwt",
    "versions": [
      {
        "version": ">= 2.13.0, < 2.14.0",
        "status": "affected"
      }
    ]
  }
]

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28 Sep 2026 20:21Current
CVSS 3.17.4
EPSS0.00182
SSVC
57