The vulnerability of the HMACAlgorithm.prepare_key() function in the PyJWT library allows a perpetrator to bypass existing security mechanisms and gain unauthorized access to protected information.
🗓️ 02 Oct 2026 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec🔗 bdu.fstec.ru👁 1 Views
| Reporter | Title | Published | Views | Family All 185 |
|---|---|---|---|---|
 | CVE-2026-102271 vulnerabilities | 30 Sep 202620:54 | – | cgr |
 | CVE-2026-102271 | 11 Sep 202613:37 | – | circl |
 | CVE-2026-102271 | 28 Sep 202620:31 | – | cve |
 | CVE-2026-102271 PyJWT: Public keys in DER form are accepted as HMAC secrets, bypassing the CVE-2022-29217 guard | 28 Sep 202620:31 | – | cvelist |
 | CVE-2026-102271 | 28 Sep 202620:31 | – | debiancve |
 | EUVD-2026-88539 | 28 Sep 202620:31 | – | euvd |
 | PyJWT: Public keys in DER form are accepted as HMAC secrets, bypassing the CVE-2022-29217 guard | 29 Sep 202623:14 | – | github |
 | PyJWT: Public keys in DER form are accepted as HMAC secrets, bypassing the CVE-2022-29217 guard | 1 Oct 202608:15 | – | mscve |
 | CVE-2026-102271 | 28 Sep 202621:17 | – | nvd |
 | AZL-105221 CVE-2026-102271 affecting package python-jwt 2.13.0-1 | 28 Sep 202621:17 | – | osv |
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02 Oct 2026 00:00Current
6.5Medium risk
Vulners AI Score6.5
CVSS 27.1
CVSS 37.4
EPSS0.00175