From 95a0df87a118a85a2c735d6b93374092e093b4ea Mon Sep 17 00:00:00 2001 From: Hetvi Thakar Date: Thu, 15 Oct 2026 19:33:19 -0700 Subject: [PATCH] python3-pyjwt: fix CVE-2026-102271 This patch applies the upstream fix as referenced in [2], using the commit shown in [1]. [1] https://github.com/jpadilla/pyjwt/commit/2798504fa2663364573cf2d1043d8d7fef389499 [2] https://github.com/jpadilla/pyjwt/security/advisories/GHSA-p4g4-x82p-q773 Signed-off-by: Hetvi Thakar Signed-off-by: Anuj Mittal --- .../python/files/CVE-2026-102271.patch | 136 ++++++++++++++++++ .../python/python3-pyjwt_2.12.1.bb | 1 + 2 files changed, 137 insertions(+) create mode 100644 meta-python/recipes-devtools/python/files/CVE-2026-102271.patch diff --git a/meta-python/recipes-devtools/python/files/CVE-2026-102271.patch b/meta-python/recipes-devtools/python/files/CVE-2026-102271.patch new file mode 100644 index 0000000000..c6e255d62b --- /dev/null +++ b/meta-python/recipes-devtools/python/files/CVE-2026-102271.patch @@ -0,0 +1,136 @@ +From 2798504fa2663364573cf2d1043d8d7fef389499 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Jos=C3=A9=20Padilla?= +Date: Thu, 10 Sep 2026 08:33:25 -0400 +Subject: [PATCH] fix: reject DER public keys as HMAC secrets + +CVE: CVE-2026-102271 +Upstream-Status: Backport [https://github.com/jpadilla/pyjwt/commit/2798504fa2663364573cf2d1043d8d7fef389499] + +(cherry picked from commit 2798504fa2663364573cf2d1043d8d7fef389499) +Signed-off-by: Hetvi Thakar +--- + jwt/algorithms.py | 27 ++++++++++++++++++++++++++- + tests/test_algorithms.py | 39 +++++++++++++++++++++++++++++++++++++++ + 2 files changed, 65 insertions(+), 1 deletion(-) + +diff --git a/jwt/algorithms.py b/jwt/algorithms.py +index cf6da45..432fdcf 100644 +--- a/jwt/algorithms.py ++++ b/jwt/algorithms.py +@@ -33,6 +33,7 @@ from .utils import ( + ) + + try: ++ from cryptography import x509 + from cryptography.exceptions import InvalidSignature, UnsupportedAlgorithm + from cryptography.hazmat.backends import default_backend + from cryptography.hazmat.primitives import hashes +@@ -72,6 +73,7 @@ try: + NoEncryption, + PrivateFormat, + PublicFormat, ++ load_der_public_key, + load_pem_private_key, + load_pem_public_key, + load_ssh_public_key, +@@ -322,10 +324,33 @@ class HMACAlgorithm(Algorithm): + def __init__(self, hash_alg: HashlibHash) -> None: + self.hash_alg = hash_alg + ++ @staticmethod ++ def _is_der_key(key_bytes: bytes) -> bool: ++ if not has_crypto: ++ return False ++ ++ try: ++ load_der_public_key(key_bytes) ++ except (TypeError, ValueError, UnsupportedAlgorithm): ++ pass ++ else: ++ return True ++ ++ try: ++ x509.load_der_x509_certificate(key_bytes) ++ except (TypeError, ValueError, UnsupportedAlgorithm): ++ return False ++ else: ++ return True ++ + def prepare_key(self, key: str | bytes) -> bytes: + key_bytes = force_bytes(key) + +- if is_pem_format(key_bytes) or is_ssh_key(key_bytes): ++ if ( ++ is_pem_format(key_bytes) ++ or is_ssh_key(key_bytes) ++ or self._is_der_key(key_bytes) ++ ): + raise InvalidKeyError( + "The specified key is an asymmetric key or x509 certificate and" + " should not be used as an HMAC secret." +diff --git a/tests/test_algorithms.py b/tests/test_algorithms.py +index 4e149a7..acaa1fe 100644 +--- a/tests/test_algorithms.py ++++ b/tests/test_algorithms.py +@@ -12,6 +12,7 @@ from .keys import load_ec_pub_key_p_521, load_hmac_key, load_rsa_pub_key + from .utils import crypto_required, key_path + + if has_crypto: ++ from cryptography import x509 + from cryptography.hazmat.primitives.asymmetric.ec import ( + EllipticCurvePrivateKey, + EllipticCurvePublicKey, +@@ -28,6 +29,10 @@ if has_crypto: + RSAPrivateKey, + RSAPublicKey, + ) ++ from cryptography.hazmat.primitives.serialization import ( ++ Encoding, ++ PublicFormat, ++ ) + + from jwt.algorithms import ECAlgorithm, OKPAlgorithm, RSAAlgorithm, RSAPSSAlgorithm + +@@ -187,6 +192,40 @@ class TestAlgorithms: + key = algo.prepare_key('{"this": "is just a json-shaped secret"}') + assert key == b'{"this": "is just a json-shaped secret"}' + ++ @crypto_required ++ @pytest.mark.parametrize( ++ "key_format_name", ++ ("SubjectPublicKeyInfo", "PKCS1"), ++ ) ++ def test_hmac_prepare_key_rejects_der_public_key( ++ self, key_format_name: str ++ ) -> None: ++ algo = HMACAlgorithm(HMACAlgorithm.SHA256) ++ public_key = cast(RSAPublicKey, load_rsa_pub_key()) ++ der_key = public_key.public_bytes( ++ Encoding.DER, getattr(PublicFormat, key_format_name) ++ ) ++ ++ with pytest.raises(InvalidKeyError, match="asymmetric key"): ++ algo.prepare_key(der_key) ++ ++ @crypto_required ++ def test_hmac_prepare_key_rejects_der_certificate(self) -> None: ++ algo = HMACAlgorithm(HMACAlgorithm.SHA256) ++ with open(key_path("testkey_rsa.cer"), "rb") as certificate_file: ++ certificate = x509.load_pem_x509_certificate(certificate_file.read()) ++ der_certificate = certificate.public_bytes(Encoding.DER) ++ ++ with pytest.raises(InvalidKeyError, match="x509 certificate"): ++ algo.prepare_key(der_certificate) ++ ++ @crypto_required ++ def test_hmac_prepare_key_accepts_non_key_binary_secret(self) -> None: ++ algo = HMACAlgorithm(HMACAlgorithm.SHA256) ++ secret = b"\x30\x82not-a-der-key" ++ ++ assert algo.prepare_key(secret) == secret ++ + @crypto_required + def test_rsa_should_parse_pem_public_key(self) -> None: + algo = RSAAlgorithm(RSAAlgorithm.SHA256) +-- +2.35.6 diff --git a/meta-python/recipes-devtools/python/python3-pyjwt_2.12.1.bb b/meta-python/recipes-devtools/python/python3-pyjwt_2.12.1.bb index b93806fe48..cd91139d58 100644 --- a/meta-python/recipes-devtools/python/python3-pyjwt_2.12.1.bb +++ b/meta-python/recipes-devtools/python/python3-pyjwt_2.12.1.bb @@ -15,6 +15,7 @@ SRC_URI += "file://CVE-2026-48522.patch \ file://CVE-2026-102269.patch \ file://CVE-2026-102267.patch \ file://CVE-2026-102268_CVE-2026-102270.patch \ + file://CVE-2026-102271.patch \ " SRC_URI[sha256sum] = "c74a7a2adf861c04d002db713dd85f84beb242228e671280bf709d765b03672b"