CWE-347: Improper Verification of Cryptographic Signature, page 8
Filter
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
What the weakness is: CWE-347 at MITRE
Ask an AI about CWE-347
ChatGPTClaudePerplexityGoogle AI Mode
Show the prompt
Explain CWE-347: Improper Verification of Cryptographic Signature and how to prevent and detect it in code. Use https://cwe.mitre.org/data/definitions/347.html and https://cve.bz/cve/cwe/347?via=ask-ai-copy for recent CVEs with this weakness. Cite the sources.Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this weakness's id and public links.
- 8.2CVE-2026-4478EPSS 0.3%
A vulnerability was identified in Yi Technology YI Home Camera 2 2.1.1_20171024151200. This impacts an unknown function of the file home/web/ipc of the component HTTP Firmware Update Handler. The manipulation leads to improper verification…
- 7.0CVE-2026-32294EPSS 0.1%
JetKVM prior to 0.5.4 does not verify the authenticity of downloaded firmware files. An attacker-in-the-middle or a compromised update server could modify the firmware and the corresponding SHA256 hash to pass verification.
- 9.0CVE-2026-3564EPSS 0.4%
A condition in the ScreenConnect server component may allow an actor with access to server-level cryptographic material used for authentication to obtain unauthorized access, including elevated privileges, in certain scenarios. ScreenConne…
- 7.7CVE-2026-4258EPSS 0.3%
Versions of the package sjcl before 1.0.9 are vulnerable to Improper Verification of Cryptographic Signature due to missing point-on-curve validation in sjcl.ecc.basicKey.publicKey(). An attacker can recover a victim's ECDH private key by …
- 9.1CVE-2026-27962EPSS 0.6%
Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.9, a JWK Header Injection vulnerability in authlib's JWS implementation allows an unauthenticated attacker to forge arbitrary JWT tokens that p…
- 8.8CVE-2026-3562EPSS 0.3%
Philips Hue Bridge hk_hap Ed25519 Signature Verification Authentication Bypass Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Philips Hue Bridge. Authentication is…
- 7.5CVE-2026-32614EPSS 0.2%
Go ShangMi (Commercial Cryptography) Library (GMSM) is a cryptographic library that covers the Chinese commercial cryptographic public algorithms SM2/SM3/SM4/SM9/ZUC. Prior to 0.41.1, the current SM9 decryption implementation contains an i…
- 5.9CVE-2026-21002EPSS 0.07%
Improper verification of cryptographic signature in Galaxy Store prior to version 4.6.03.8 allows local attacker to install arbitrary application.
- 5.3CVE-2026-20997EPSS 0.3%
Improper verification of cryptographic signature in Smart Switch prior to version 3.7.69.15 allows remote attackers to potentially bypass authentication.
- 5.1CVE-2026-20989EPSS 0.1%
Improper verification of cryptographic signature in Font Settings prior to SMR Mar-2026 Release 1 allows physical attackers to use custom font.
- 9.8CVE-2025-52648EPSS 0.1%
HCL AION is affected by a vulnerability where offering images are not digitally signed. Lack of image signing may allow the use of unverified or tampered images, potentially leading to security risks such as integrity compromise or uninten…
- 7.5CVE-2026-32597EPSS 0.3%
PyJWT is a JSON Web Token implementation in Python. Prior to 2.12.0, PyJWT does not validate the crit (Critical) Header Parameter defined in RFC 7515 §4.1.11. When a JWS token contains a crit array listing extensions that PyJWT does not un…
- 7.1CVE-2026-28432EPSS 0.2%
Misskey is an open source, federated social media platform. All Misskey servers prior to 2026.3.1 contain a vulnerability that allows bypassing HTTP signature verification. Although this is a vulnerability related to federation, it affects…
- 7.2CVE-2025-41767EPSS 0.2%
A high-privileged remote attacker can fully compromise the device by abusing an update signature bypass vulnerability in the wwwupdate.cgi method in the web interface of UBR.
- 1.7CVE-2026-3706EPSS 0.2%
A vulnerability was determined in mkj Dropbear up to 2025.89. Impacted is the function unpackneg of the file src/curve25519.c of the component S Range Check. This manipulation causes improper verification of cryptographic signature. The at…
- 7.7CVE-2026-28802EPSS 0.5%
Authlib is a Python library which builds OAuth and OpenID Connect servers. From version 1.6.5 to before version 1.6.7, previous tests involving passing a malicious JWT containing alg: none and an empty signature was passing the signature v…
- 9.3CVE-2026-29000EPSS 6.2%
pac4j-jwt versions prior to 4.5.9, 5.7.9, and 6.3.3 contain an authentication bypass vulnerability in JwtAuthenticator when processing encrypted JWTs that allows remote attackers to forge authentication tokens. Attackers who possess the se…
- 6.9CVE-2026-2746EPSS 0.2%
SEPPmail Secure Email Gateway before version 15.0.1 does not properly communicate PGP signature verification results, leaving users unable to detect forged emails.
- 6.9CVE-2026-27445EPSS 0.1%
SEPPmail Secure Email Gateway before version 15.0.1 does not properly verify that a PGP signature was generated by the expected key, allowing signature spoofing.
- 2.9CVE-2025-15598EPSS 0.2%
A vulnerability was found in Dataease SQLBot up to 1.5.1. This impacts the function validateEmbedded of the file backend/apps/system/middleware/auth.py of the component JWT Token Handler. Performing a manipulation results in improper verif…
- 8.7CVE-2026-3338EPSS 0.8%
Improper signature validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass signature verification when processing PKCS7 objects with Authenticated Attributes. Customers of AWS services do not need to take action.…
- 3.1CVE-2025-12150EPSS 0.2%
A flaw was found in Keycloak’s WebAuthn registration component. This vulnerability allows an attacker to bypass the configured attestation policy and register untrusted or forged authenticators via submission of an attestation object with …
- 2.7CVE-2026-22866EPSS 0.2%
Ethereum Name Service (ENS) is a distributed, open, and extensible naming system based on the Ethereum blockchain. In versions 1.6.2 and prior, the `RSASHA256Algorithm` and `RSASHA1Algorithm` contracts fail to validate PKCS#1 v1.5 padding …
- 2.9CVE-2026-2968EPSS 0.3%
A vulnerability was detected in Cesanta Mongoose up to 7.20. This impacts the function mg_chacha20_poly1305_decrypt of the file /src/tls_chacha20.c of the component Poly1305 Authentication Tag Handler. The manipulation results in improper …
- 6.7CVE-2025-32060EPSS 0.1%
The system suffers from the absence of a kernel module signature verification. If an attacker can execute commands on behalf of root user (due to additional vulnerabilities), then he/she is also able to load custom kernel modules to the ke…
- 8.8CVE-2026-25922EPSS 0.2%
authentik is an open-source identity provider. Prior to 2025.8.6, 2025.10.4, and 2025.12.4, when using a SAML Source that has the option Verify Assertion Signature under Verification Certificate enabled and not Verify Response Signature, o…
- 8.8CVE-2026-23687EPSS 0.5%
SAP NetWeaver Application Server ABAP and ABAP Platform allows an authenticated attacker with normal privileges to obtain a valid signed message and send modified signed XML documents to the verifier. This may result in acceptance of tampe…
- 8.1CVE-2026-1529EPSS 0.5%
A flaw was found in Keycloak. An attacker can exploit this vulnerability by modifying the organization ID and target email within a legitimate invitation token's JSON Web Token (JWT) payload. This lack of cryptographic signature verificati…
- 7.6CVE-2026-25793EPSS 0.1%
Nebula is a scalable overlay networking tool. In versions from 1.7.0 to 1.10.2, when using P256 certificates (which is not the default configuration), it is possible to evade a blocklist entry created against the fingerprint of a certifica…
- 9.6CVE-2026-1568EPSS 0.2%
Rapid7 InsightVM versions before 8.34.0 contain a signature verification issue on the Assertion Consumer Service (ACS) cloud endpoint that could allow an attacker to gain unauthorized access to InsightVM accounts setup via "Security Consol…
- 8.7CVE-2026-0750EPSS 0.3%
Improper Verification of Cryptographic Signature vulnerability in Drupal Drupal Commerce Paybox Commerce Paybox on Drupal 7.X allows Authentication Bypass.This issue affects Drupal Commerce Paybox: from 7-x-1.0 through 7.X-1.5.
- 2.1CVE-2026-1237EPSS 0.1%
Vulnerable cross-model authorization in juju. If a charm's cross-model permissions are revoked or expire, a malicious user who is able to update database records can mint an invalid macaroon that is incorrectly validated by the juju contro…
- 5.3CVE-2026-24850EPSS 0.3%
The ML-DSA crate is a Rust implementation of the Module-Lattice-Based Digital Signature Standard (ML-DSA). Starting in version 0.0.4 and prior to version 0.1.0-rc.4, the ML-DSA signature verification implementation in the RustCrypto `ml-ds…
- 5.5CVE-2025-15469EPSS 0.2%
Issue summary: The 'openssl dgst' command-line tool silently truncates input data to 16MB when using one-shot signing algorithms and reports success instead of an error. Impact summary: A user signing or verifying files larger than 16MB w…
- 5.3CVE-2026-24807EPSS 0.4%
Improper Verification of Cryptographic Signature vulnerability in liuyueyi quick-media (plugins/svg-plugin/batik-codec-fix/src/main/java/org/apache/batik/ext/awt/image/codec/util modules). This vulnerability is associated with program file…
- 9.3CVE-2026-22696EPSS 0.2%
dcap-qvl implements the quote verification logic for DCAP (Data Center Attestation Primitives). A vulnerability present in versions prior to 0.3.9 involves a critical gap in the cryptographic verification process within the dcap-qvl. The l…
- 7.5CVE-2026-23992EPSS 0.2%
go-tuf is a Go implementation of The Update Framework (TUF). Starting in version 2.0.0 and prior to version 2.3.1, a compromised or misconfigured TUF repository can have the configured value of signature thresholds set to 0, which effectiv…
- 7.5CVE-2026-23967EPSS 0.2%
sm-crypto provides JavaScript implementations of the Chinese cryptographic algorithms SM2, SM3, and SM4. A signature malleability vulnerability exists in the SM2 signature verification logic of the sm-crypto library prior to version 0.3.14…
- 7.5CVE-2026-23965EPSS 0.2%
sm-crypto provides JavaScript implementations of the Chinese cryptographic algorithms SM2, SM3, and SM4. A signature forgery vulnerability exists in the SM2 signature verification logic of sm-crypto prior to version 0.4.0. Under default co…
- 9.3CVE-2026-23518EPSS 0.3%
Fleet is open source device management software. In versions prior to 4.78.3, 4.77.1, 4.76.2, 4.75.2, and 4.53.3, a vulnerability in Fleet's Windows MDM enrollment flow could allow an attacker to submit forged authentication tokens that ar…
- 9.8CVE-2025-36418EPSS 0.2%
IBM ApplinX 11.1 is vulnerable due to a privilege escalation vulnerability due to improper verification of JWT tokens. An attacker may be able to craft or modify a JSON web token in order to impersonate another user or to elevate their pri…
- 8.4CVE-2025-12007EPSS 0.1%
There is a vulnerability in the Supermicro BMC firmware validation logic at Supermicro MBD-X13SEM-F . An attacker can update the system firmware with a specially crafted image.
- 7.2CVE-2025-12006EPSS 0.3%
There is a vulnerability in the Supermicro BMC firmware validation logic at Supermicro MBD-X12STW-F . An attacker can update the system firmware with a specially crafted image.
- 6.5CVE-2026-22818EPSS 0.1%
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.11.4, there is a flaw in Hono’s JWK/JWKS JWT verification middleware allowed the algorithm specified in the JWT header to influence signature …
- 6.5CVE-2026-22817EPSS 0.2%
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.11.4, there is a flaw in Hono’s JWK/JWKS JWT verification middleware allowed the JWT header’s alg value to influence signature verification wh…
- 6.9CVE-2025-68925EPSS 0.2%
Jervis is a library for Job DSL plugin scripts and shared Jenkins pipeline libraries. Prior to 2.2, the code doesn't validate that the JWT header specifies "alg":"RS256". This vulnerability is fixed in 2.2.
- 7.5CVE-2026-20965EPSS 0.2%
Improper verification of cryptographic signature in Windows Admin Center allows an authorized attacker to elevate privileges locally.
- 9.8CVE-2025-15444EPSS 0.3%
Crypt::Sodium::XS module versions prior to 0.000042, for Perl, include a vulnerable version of libsodium libsodium <= 1.0.20 or a version of libsodium released before December 30, 2025 contains a vulnerability documented as CVE-2025-69277…
- 4.7CVE-2025-68972EPSS 0.1%
In GnuPG through 2.4.8, if a signed message has \f at the end of a plaintext line, an adversary can construct a modified message that places additional text after the signed material, such that signature verification of the modified messag…
- 9.3CVE-2023-53951EPSS 0.4%
Ever Gauzy v0.281.9 contains a JWT authentication vulnerability that allows attackers to exploit weak HMAC secret key implementation. Attackers can leverage the exposed JWT token to authenticate and gain unauthorized access with administra…