CVE-2026-102271

PyJWT is a Python implementation of JSON Web Token standards. From 2.4.0 until 2.14.0, PyJWT HMACAlgorithm.preparekey is affected because asymmetric-key guard relies on textual markers that are absent from DER encoding. This occurs when an application mixes HMAC and asymmetric algorithms and...

CVE-2026-102271 PyJWT: Public keys in DER form are accepted as HMAC secrets, bypassing the CVE-2022-29217 guard

PyJWT is a Python implementation of JSON Web Token standards. From 2.4.0 until 2.14.0, PyJWT HMACAlgorithm.preparekey is affected because asymmetric-key guard relies on textual markers that are absent from DER encoding. This occurs when an application mixes HMAC and asymmetric algorithms and...

Improper Verification of Cryptographic Signature

Overview Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature in the HMAC secret guard of jose/backends/native.py, which rejects a key only when ispemformatkey or issshkeykey holds and so never catches DER-encoded binary SubjectPublicKeyInfo public...

CVE-2026-85394 python-jose through 3.5.0 Algorithm Confusion via DER-encoded Public Key as HMAC Secret

python-jose through 3.5.0 fails to properly validate asymmetric keys in HMAC initialization, accepting DER-encoded public keys that lack PEM armor or SSH prefixes. Attackers holding the service's public key can forge HS256 tokens that pass verification when algorithms are not explicitly restricte...

JLSEC-2026-1272

gf2n.cpp in Crypto++ aka cryptopp through 8.9.0 allows attackers to cause a denial of service application crash via DER public-key data for an F2^m curve, if the degree of each term in the polynomial is not strictly decreasing...

JLSEC-2026-1273

ModularSquareRoot in Crypto++ aka cryptopp through 8.9.0 allows attackers to cause a denial of service infinite loop via crafted DER public-key data associated with squared odd numbers, such as the square of 268995137513890432434389773128616504853...

PT-2026-80514

gf2n.cpp in Crypto++ aka cryptopp through 8.9.0 allows attackers to cause a denial of service application crash via DER public-key data for an F2^m curve, if the degree of each term in the polynomial is not strictly decreasing...

PT-2026-80515

ModularSquareRoot in Crypto++ aka cryptopp through 8.9.0 allows attackers to cause a denial of service infinite loop via crafted DER public-key data associated with squared odd numbers, such as the square of 268995137513890432434389773128616504853...

SUSE-SU-2024:0030-1 Security update for libcryptopp

This update for libcryptopp fixes the following issues: - CVE-2023-50980: Fixed DoS via malformed DER public key file bsc1218219...

Denial Of Service (DoS)

libcryptopp.so is vulnerable to Denial Of Service DoS. The vulnerability is caused when DER public key data for an F2^m curve is not strictly decreasing each polynomial term, which allows an attacker to cause an application crash...

CVE-2023-50981

ModularSquareRoot in Crypto++ aka cryptopp through 8.9.0 allows attackers to cause a denial of service infinite loop via crafted DER public-key data associated with squared odd numbers, such as the square of 268995137513890432434389773128616504853...

CVE-2023-50980

gf2n.cpp in Crypto++ aka cryptopp through 8.9.0 allows attackers to cause a denial of service application crash via DER public-key data for an F2^m curve, if the degree of each term in the polynomial is not strictly decreasing...

DEBIAN-CVE-2023-50980

gf2n.cpp in Crypto++ aka cryptopp through 8.9.0 allows attackers to cause a denial of service application crash via DER public-key data for an F2^m curve, if the degree of each term in the polynomial is not strictly decreasing...

Command injection

gf2n.cpp in Crypto++ aka cryptopp through 8.9.0 allows attackers to cause a denial of service application crash via DER public-key data for an F2^m curve, if the degree of each term in the polynomial is not strictly decreasing...

UBUNTU-CVE-2023-50980

gf2n.cpp in Crypto++ aka cryptopp through 8.9.0 allows attackers to cause a denial of service application crash via DER public-key data for an F2^m curve, if the degree of each term in the polynomial is not strictly decreasing...

CVE-2023-50981

ModularSquareRoot in Crypto++ aka cryptopp through 8.9.0 allows attackers to cause a denial of service infinite loop via crafted DER public-key data associated with squared odd numbers, such as the square of 268995137513890432434389773128616504853...

Code injection

ModularSquareRoot in Crypto++ aka cryptopp through 8.9.0 allows attackers to cause a denial of service infinite loop via crafted DER public-key data associated with squared odd numbers, such as the square of 268995137513890432434389773128616504853...

UBUNTU-CVE-2023-50981

ModularSquareRoot in Crypto++ aka cryptopp through 8.9.0 allows attackers to cause a denial of service infinite loop via crafted DER public-key data associated with squared odd numbers, such as the square of 268995137513890432434389773128616504853...

CVE-2023-50981

ModularSquareRoot in Crypto++ aka cryptopp through 8.9.0 allows attackers to cause a denial of service infinite loop via crafted DER public-key data associated with squared odd numbers, such as the square of 268995137513890432434389773128616504853...

PT-2023-31719

Name of the Vulnerable Software and Affected Versions Crypto++ cryptopp versions prior to 8.9.0 Description The issue allows attackers to cause a denial of service, specifically an infinite loop, through crafted DER public-key data associated with squared odd numbers. This can be achieved with...