How many CVEs have patched _verify_signature?

2 published CVEs changed _verify_signature in jpadilla/pyjwt, in 2 distinct patches totalling 4 changed lines, between 2024 and 2026.

What is the latest CVE that changed _verify_signature?

CVE-2026-102266 (PyJWK accepts empty HMAC keys, bypassing PyJWT's empty-key validation), published 2026-09-28, changed lines 417 of jwt/api_jws.py.

How does _verify_signature compare to the rest of jpadilla/pyjwt?

jpadilla/pyjwt has 17 CVEs with a located fix in total; 2 of them changed _verify_signature.

What do the line numbers refer to?

Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

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jpadilla/pyjwt

Function

_verify_signature

Name: _verify_signature in jpadilla/pyjwt: CVE fixes
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

jwt/api_jws.py

Last patched September 28, 2026

2

CVEs

That changed this function

2

Distinct patches

Backports counted once

4

Lines changed

Added plus removed

2024–2026

Years

By CVE publication date

Overview

_verify_signature in jpadilla/pyjwt was changed by 2 published CVE fixes between 2024 and 2026, in 2 distinct patches that added or removed 4 lines in total.

jpadilla/pyjwt has 17 CVEs with a located fix in total, so 12% of them touched this function.

CVEs that patched it

Every published CVE whose fix changed _verify_signature, newest first, with the lines each fix touched.

PyJWK accepts empty HMAC keys, bypassing PyJWT's empty-key validation
CVE-2026-102266 · line 417 · +1 −1
Critical · CVSS 9.1
EPSS 0.2%2026-09-28
Issuer field partial matches allowed in pyjwt
CVE-2024-53861 · line 295 · +1 −1
Low · CVSS 2.1
EPSS 0.8%2024-11-29

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Other functions in these files

Functions in the same file that CVE fixes also changed.

Other hotspots in the repository

Functions in jpadilla/pyjwt changed by the most CVE fixes.

prepare_key4 CVEs · jwt/algorithms.py raw_to_der_signature3 CVEs · jwt/utils.py _load2 CVEs · jwt/api_jws.py fetch_data2 CVEs · jwt/jwks_client.py decode2 CVEs · jwt/api_jws.py decode2 CVEs · jwt/api_jwt.py

All patched functions in jpadilla/pyjwt

Frequently asked questions

Common questions about CVE fixes to _verify_signature.

How many CVEs have patched _verify_signature?: 2 published CVEs changed _verify_signature in jpadilla/pyjwt, in 2 distinct patches totalling 4 changed lines, between 2024 and 2026.
What is the latest CVE that changed _verify_signature?: CVE-2026-102266 (PyJWK accepts empty HMAC keys, bypassing PyJWT's empty-key validation), published 2026-09-28, changed lines 417 of jwt/api_jws.py.
How does _verify_signature compare to the rest of jpadilla/pyjwt?: jpadilla/pyjwt has 17 CVEs with a located fix in total; 2 of them changed _verify_signature.
What do the line numbers refer to?: Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

References

Fix locations are computed by RadicalNotion.AI from the upstream patch diff of each CVE. CVE data is sourced from the CVE Program.

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