# pyjwt (PyPI) vulnerabilities Source: https://junglewise.ai/threats/technologies/pypi-pyjwt Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/pypi-pyjwt.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 25 vulnerabilities in pyjwt (PyPI): 0 in the last 7 days and 15 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, PyJWT HS256/384/512 token forgery via empty HMAC key in oct JWK, was published on 22 October 2026. 1 vulnerability in the last four weeks, down 93% on the four before (14). 0 critical against 1. ## Counts - Last 7 days: 0 - Last 30 days: 1 - Last 90 days: 15 - All time: 25 (1 critical, 0 exploited in the wild) ## About pyjwt (PyPI) PyJWT is a Python library for encoding and decoding JSON Web Tokens (JWT). ## Latest pyjwt (PyPI) vulnerabilities - [PyJWT HS256/384/512 token forgery via empty HMAC key in oct JWK](https://junglewise.ai/threats/pyjwt-hs256-384-512-verify-accepts-empty-hmac-key-via-oct-jwk-pyjwk-a3ba63d2) (high, CVSS 7.4, published 22 Oct 2026) - [CVE-2026-103001: PyJWT decode() options-dict mutation enabling claim-verification bypass](https://junglewise.ai/threats/cve-2026-103001-pyjwt-decode-reintroduces-options-dict-mutation-enabling-silent) (medium, CVSS 6.5, published 30 Sep 2026) - [CVE-2026-102275: PyJWT OKP algorithm key validation bypass](https://junglewise.ai/threats/cve-2026-102275-pyjwt-is-a-python-implementation-of-json-web-token-standards) (medium, CVSS 6.5, published 28 Sep 2026) - [CVE-2026-102274: PyJWT unhandled ValueError in JWK Set parsing](https://junglewise.ai/threats/cve-2026-102274-pyjwt-is-a-python-implementation-of-json-web-token-standards) (medium, CVSS 5.9, published 28 Sep 2026) - [CVE-2026-102273: PyJWT HMAC key validation bypass in HMACAlgorithm.prepare_key](https://junglewise.ai/threats/cve-2026-102273-pyjwt-is-a-python-implementation-of-json-web-token-standards) (high, CVSS 7.4, published 28 Sep 2026) - [CVE-2026-102272: PyJWT HMAC key confusion via BOM-prefixed public JWK](https://junglewise.ai/threats/cve-2026-102272-pyjwt-is-a-python-implementation-of-json-web-token-standards) (high, CVSS 7.4, published 28 Sep 2026) - [CVE-2026-102271: PyJWT HMAC token forgery via DER public key confusion](https://junglewise.ai/threats/cve-2026-102271-pyjwt-is-a-python-implementation-of-json-web-token-standards) (high, CVSS 7.4, published 28 Sep 2026) - [CVE-2026-102270: PyJWT denial of service in PEM format validation](https://junglewise.ai/threats/cve-2026-102270-pyjwt-is-a-python-implementation-of-json-web-token-standards) (medium, CVSS 4.4, published 28 Sep 2026) - [CVE-2026-102269: PyJWT signature validation bypass via non-canonical Base64URL](https://junglewise.ai/threats/cve-2026-102269-pyjwt-is-a-python-implementation-of-json-web-token-standards) (medium, CVSS 4.8, published 28 Sep 2026) - [CVE-2026-102268: PyJWT HMAC signature forgery via PEM parsing bypass](https://junglewise.ai/threats/cve-2026-102268-pyjwt-is-a-python-implementation-of-json-web-token-standards) (critical, CVSS 9.1, published 28 Sep 2026) - [CVE-2026-102267: PyJWT open redirect in PyJWKClient JWKS fetches](https://junglewise.ai/threats/cve-2026-102267-pyjwt-is-a-python-implementation-of-json-web-token-standards) (high, CVSS 7.4, published 28 Sep 2026) - [CVE-2026-102266: PyJWT HMAC key validation bypass in JWK parsing](https://junglewise.ai/threats/cve-2026-102266-pyjwt-is-a-python-implementation-of-json-web-token-standards) (high, CVSS 7.4, published 28 Sep 2026) - [CVE-2026-102265: PyJWT denial of service via deeply nested token headers](https://junglewise.ai/threats/cve-2026-102265-pyjwt-is-a-python-implementation-of-json-web-token-standards) (medium, CVSS 5.3, published 28 Sep 2026) - [CVE-2026-101918: PyJWT recursion error denial of service](https://junglewise.ai/threats/cve-2026-101918-pyjwt-is-a-python-implementation-of-json-web-token-standards) (medium, CVSS 5.3, published 28 Sep 2026) - [CVE-2026-101917: PyJWT JWKS client denial-of-service via cache bypass](https://junglewise.ai/threats/cve-2026-101917-pyjwt-is-a-python-implementation-of-json-web-token-standards) (medium, CVSS 5.3, published 28 Sep 2026) - [CVE-2024-53861: PYSEC-2026-1814 - PyJWT Issuer field partial matches allowed](https://junglewise.ai/threats/cve-2024-53861-pyjwt-issuer-field-partial-matches-allowed) (low, CVSS 3.1, published 7 Jul 2026) - [CVE-2026-48526: PyJWT algorithm confusion via JSON Web Keys](https://junglewise.ai/threats/cve-2026-48526-pyjwt-algorithm-confusion-via-json-web-keys) (high, CVSS 7.4, published 28 May 2026) - [CVE-2026-48525: PyJWT Denial of Service in detached JWS verification](https://junglewise.ai/threats/cve-2026-48525-pyjwt-denial-of-service-in-detached-jws-verification) (medium, CVSS 5.3, published 28 May 2026) - [CVE-2026-48524: PyJWT denial of service via unbounded JWKS endpoint requests](https://junglewise.ai/threats/cve-2026-48524-pyjwt-denial-of-service-via-unbounded-jwks-endpoint-requests) (low, CVSS 3.7, published 28 May 2026) - [CVE-2026-48523: PyJWT algorithm allow-list bypass in PyJWK verification](https://junglewise.ai/threats/cve-2026-48523-pyjwt-algorithm-allow-list-bypass-in-pyjwk-verification) (medium, CVSS 5.4, published 28 May 2026) - [CVE-2026-48522: PyJWT SSRF and token forgery in PyJWKClient via URI schemes](https://junglewise.ai/threats/cve-2026-48522-pyjwt-ssrf-and-token-forgery-in-pyjwkclient-via-uri-schemes) (medium, CVSS 4.2, published 28 May 2026) - [CVE-2026-32597: PyJWT insufficient verification of critical header extensions](https://junglewise.ai/threats/cve-2026-32597-pyjwt-insufficient-verification-of-critical-header-extensions) (high, CVSS 7.5, published 13 Mar 2026) - [CVE-2025-45768: PYSEC-2025-183 - pyjwt v2.10.1 was discovered to contain weak encryption. NOTE: this is disputed by the Supplier…](https://junglewise.ai/threats/cve-2025-45768-pysec-2025-183-pyjwt-v2-10-1-was-discovered-to-contain-weak) (low, CVSS 3.1, published 31 Jul 2025) - [CVE-2022-29217: Key confusion through non-blocklisted public key formats](https://junglewise.ai/threats/cve-2022-29217-key-confusion-through-non-blocklisted-public-key-formats) (low, CVSS 3.1, published 24 May 2022) - [CVE-2017-11424: PyJWT vulnerable to key confusion attacks](https://junglewise.ai/threats/cve-2017-11424-pyjwt-vulnerable-to-key-confusion-attacks) (low, CVSS 3, published 24 Aug 2017) ## Most severe pyjwt (PyPI) vulnerabilities - [CVE-2026-102268: PyJWT HMAC signature forgery via PEM parsing bypass](https://junglewise.ai/threats/cve-2026-102268-pyjwt-is-a-python-implementation-of-json-web-token-standards) (critical, CVSS 9.1, published 28 Sep 2026) - [CVE-2026-32597: PyJWT insufficient verification of critical header extensions](https://junglewise.ai/threats/cve-2026-32597-pyjwt-insufficient-verification-of-critical-header-extensions) (high, CVSS 7.5, published 13 Mar 2026) - [CVE-2026-48526: PyJWT algorithm confusion via JSON Web Keys](https://junglewise.ai/threats/cve-2026-48526-pyjwt-algorithm-confusion-via-json-web-keys) (high, CVSS 7.4, published 28 May 2026) - [CVE-2026-102272: PyJWT HMAC key confusion via BOM-prefixed public JWK](https://junglewise.ai/threats/cve-2026-102272-pyjwt-is-a-python-implementation-of-json-web-token-standards) (high, CVSS 7.4, published 28 Sep 2026) - [CVE-2026-102273: PyJWT HMAC key validation bypass in HMACAlgorithm.prepare_key](https://junglewise.ai/threats/cve-2026-102273-pyjwt-is-a-python-implementation-of-json-web-token-standards) (high, CVSS 7.4, published 28 Sep 2026) - [CVE-2026-102271: PyJWT HMAC token forgery via DER public key confusion](https://junglewise.ai/threats/cve-2026-102271-pyjwt-is-a-python-implementation-of-json-web-token-standards) (high, CVSS 7.4, published 28 Sep 2026) - [CVE-2026-102266: PyJWT HMAC key validation bypass in JWK parsing](https://junglewise.ai/threats/cve-2026-102266-pyjwt-is-a-python-implementation-of-json-web-token-standards) (high, CVSS 7.4, published 28 Sep 2026) - [CVE-2026-102267: PyJWT open redirect in PyJWKClient JWKS fetches](https://junglewise.ai/threats/cve-2026-102267-pyjwt-is-a-python-implementation-of-json-web-token-standards) (high, CVSS 7.4, published 28 Sep 2026) - [PyJWT HS256/384/512 token forgery via empty HMAC key in oct JWK](https://junglewise.ai/threats/pyjwt-hs256-384-512-verify-accepts-empty-hmac-key-via-oct-jwk-pyjwk-a3ba63d2) (high, CVSS 7.4, published 22 Oct 2026) - [CVE-2026-103001: PyJWT decode() options-dict mutation enabling claim-verification bypass](https://junglewise.ai/threats/cve-2026-103001-pyjwt-decode-reintroduces-options-dict-mutation-enabling-silent) (medium, CVSS 6.5, published 30 Sep 2026) ## Vulnerabilities per week 1 vulnerability in the last four weeks, down 93% on the four before (14). 0 critical against 1. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 14 | 1 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 1 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other PyPI technologies - [tensorflow (PyPI)](https://junglewise.ai/threats/technologies/pypi-tensorflow): 435 vulnerabilities - [tensorflow-cpu (PyPI)](https://junglewise.ai/threats/technologies/tensorflow-cpu): 430 vulnerabilities - [tensorflow-gpu (PyPI)](https://junglewise.ai/threats/technologies/tensorflow-gpu): 427 vulnerabilities - [open-webui (PyPI)](https://junglewise.ai/threats/technologies/open-webui): 177 vulnerabilities - [Django (PyPI)](https://junglewise.ai/threats/technologies/django): 173 vulnerabilities - [apache-airflow (PyPI)](https://junglewise.ai/threats/technologies/apache-airflow): 159 vulnerabilities - [pillow (PyPI)](https://junglewise.ai/threats/technologies/pillow): 125 vulnerabilities - [praisonai (PyPI)](https://junglewise.ai/threats/technologies/pypi-praisonai): 120 vulnerabilities - [vllm (PyPI)](https://junglewise.ai/threats/technologies/pypi-vllm): 117 vulnerabilities - [plone (PyPI)](https://junglewise.ai/threats/technologies/pypi-plone): 101 vulnerabilities - [mlflow (PyPI)](https://junglewise.ai/threats/technologies/mlflow): 88 vulnerabilities - [picklescan (PyPI)](https://junglewise.ai/threats/technologies/picklescan): 86 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "pyjwt (PyPI) vulnerabilities", https://junglewise.ai/threats/technologies/pypi-pyjwt, 13 November 2026.