CVE-2026-11348

Authentication Bypass in HAVELSAN's Open Source Project Liman MYS

Improper verification of cryptographic signature vulnerability in HAVELSAN Inc. Liman MYS allows Fake the Source of Data. This issue affects Liman MYS: before release.Master.1107.

CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed

Vendors

Havelsan

Products

Liman Mys

CVE-2026-3564

ScreenConnect Instance Level Cryptographic Material Exposure

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. ScreenConnect host and guest client agents are not independently affected by this CVE.

CVSS 3.1 · 9 Critical EPSS < 1% KEV · Not listed

Vendors

Connectwise

Products

Screenconnect

CVE-2026-54774

CoreWCF: SamlSerializer skips SignatureValue verification when SAML signing token is not an X.509 certificate

CoreWCF is a port of the service side of Windows Communication Foundation (WCF) to .NET Core. Prior to 1.8.1 and 1.9.1, SamlSerializer skips final SignatureValue verification when a CoreWCF service validates SAML tokens using a non-X.509 signing token, allowing an attacker to reference a non-X.509 SecurityToken key identifier and bypass assertion signature verification. This issue is fixed in versions 1.8.1 and 1.9.1.

CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed

Vendors

Corewcf

Products

Corewcf

CVE-2026-54782

CoreWCF: Authentication bypass in CoreWCF SAML 1.1 / 2.0 token signature validation

CoreWCF is a port of the service side of Windows Communication Foundation (WCF) to .NET Core. Prior to 1.8.1 and 1.9.1, CoreWCF SAML 1.1 and SAML 2.0 token validation does not correctly resolve the issuer signing key or require signed tokens when IdentityConfiguration is used with federated bindings, allowing an unauthenticated remote attacker to impersonate any principal the trusted STS could issue. This issue is fixed in versions 1.8.1 and 1.9.1.

CVSS 3.1 · 10 Critical EPSS < 1% KEV · Not listed

Vendors

Corewcf

Products

Corewcf

CVE-2026-9027

CorvusPay WooCommerce Payment Gateway <= 2.7.4 - Unauthenticated Improper Verification of Cryptographic Signature to Payment Bypass via /wp-json/corvuspay/success/ REST Endpoint

The CorvusPay WooCommerce Payment Gateway plugin for WordPress is vulnerable to Payment Bypass via Improper Verification of Cryptographic Signature in all versions up to, and including, 2.7.4. The `corvuspay_success_handler` function registers the REST endpoint `POST /wp-json/corvuspay/success/` with `'permission_callback' => '__return_true'`, and while it calls `$this->client->validate->signature()` and stores the boolean result in `$res`, the result is never evaluated in a conditional — it is only written to the debug log — causing execution to unconditionally reach `$order->payment_complete()` regardless of whether the cryptographic signature is valid. This makes it possible for unauthenticated attackers to mark any pending WooCommerce order as fully paid by sending a POST request to the success endpoint containing an arbitrary or forged signature value, allowing them to obtain goods or services without payment. Because WooCommerce order IDs are sequential integers, target orders are trivially enumerable via the `order_number` POST parameter, requiring no prior knowledge of the victim order.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

—

Products

—

CVE-2026-54783

CoreWCF: XML Signature Wrapping in WS-Security endorsing/supporting signature verification allows replay of captured signed messages

CoreWCF is a port of the service side of Windows Communication Foundation (WCF) to .NET Core. Prior to 1.8.1 and 1.9.1, CoreWCF WS-Security endorsing and supporting signature verification does not ensure the selected ds:Signature covers the expected Security header target, allowing an attacker with one captured signed SOAP envelope to replay arbitrary service operations as the victim principal. This issue is fixed in versions 1.8.1 and 1.9.1.

CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed

Vendors

Corewcf

Products

Corewcf

CVE-2026-46354

Coder: PKCS#7 signature bypass in Azure instance identity allows unauthenticated agent token theft

Coder allows organizations to provision remote development environments via Terraform. In versions prior tp 2.24.5, 2.29.13, 2.30.8, 2.31.12, 2.32.2, and 2.33.3, `azureidentity.Validate()` verifies that the PKCS#7 signer certificate chains to a trusted Azure CA but never verifies the PKCS#7 signature itself. An attacker can embed a legitimate Azure certificate alongside arbitrary content e.g. `{"vmId":"<target>"}` and the forged `vmId` will be accepted returning the victim workspace agent's session token. No authentication is required. The attacker only needs to know a target VM's `vmId` which is a `UUIDv4`. That's a practical limitation which would typically require prior access to be exploited. Versions 2.24.5, 2.29.13, 2.30.8, 2.31.12, 2.32.2, and 2.33.3 patch the issue. As a workaround, reconfigure any Azure templates to use token authentication rather than `azure-instance-identity`.

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed

Vendors

Coder

Products

Coder

CVE-2026-13743

Improper verification of cryptographic signature in CubeSpace CW0057 Reaction Wheel

CubeSpace CW0057 Reaction Wheel firmware versions prior to 5.0.20 are vulnerable to an Improper Verification of Cryptographic Signature vulnerability. This could allow an attacker with physical access to the product to upload arbitrary malicious firmware to the device without authentication.

CVSS 4.0 · 3.3 Low EPSS < 1% KEV · Not listed

Vendors

Cubespace

Products

Cw0057 Reaction Wheel

CVE-2026-58426

Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write

Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write

CVSS 3.1 · 9.6 Critical EPSS < 1% KEV · Not listed

Vendors

Gitea

Products

Gitea Open Source Git Server

CVE-2026-12252

Untrusted JAR Code Execution in Multiple Stanford Interface Classes in nltk/nltk

In nltk/nltk versions 3.9.3 and earlier, five Stanford interface classes (StanfordPOSTagger, StanfordNERTagger, StanfordParser, StanfordDependencyParser, and StanfordNeuralDependencyParser) are vulnerable to untrusted JAR code execution. These classes accept user-controllable JAR paths and execute them via the `java()` function, which invokes `subprocess.Popen()` without integrity verification. This vulnerability is identical to CVE-2026-0848, which was fixed for StanfordSegmenter by adding SHA256 verification. However, the fix was not applied to these additional classes, leaving them susceptible to arbitrary code execution when loading untrusted JAR files.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Nltk

Products

Nltk Nltk/nltk

CVE-2024-23581

HCL Traveler for Microsoft Outlook (HTMO) is susceptible to an application modification vulnerability

The HCL Traveler for Microsoft Outlook libraries are being flagged as potentially malicious software or an unrecognized application.

CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed

Vendors

Hcltech

Products

Traveler For Microsoft Outlook

CVE-2025-0824

lack of validation for firmware update in Hitachi Virtual Storage

Lack of validation for firmware update in Hitachi Hitachi Virtual Storage Platform One Block 23, 24, 26, 28. This issue affects Hitachi Virtual Storage Platform One Block 23, 24, 26, 28: before DKCMAIN A3-04-21-40/00, ESM A3-04-21/00.

CVSS 3.1 · 3.7 Low EPSS < 1% KEV · Not listed

Vendors

Hitachi

Products

Hitachi Virtual Storage Platform One Block 23 Hitachi Virtual Storage Platform One Block 24 Hitachi Virtual Storage Platform One Block 26 and 1 more

CVE-2026-4600

jsrsasign: jsrsasign: Cryptographic signature forgery via malicious DSA domain parameters

Versions of the package jsrsasign before 11.1.1 are vulnerable to Improper Verification of Cryptographic Signature via the DSA domain-parameter validation in KJUR.crypto.DSA.setPublic (and the related DSA/X509 verification flow in src/dsa-2.0.js). An attacker can forge DSA signatures or X.509 certificates that X509.verifySignature() accepts by supplying malicious domain parameters such as g=1, y=1, and a fixed r=1, which make the verification equation true for any hash.

CVSS 4.0 · 9.1 Critical EPSS < 1% KEV · Not listed

Vendors

Kjur

Products

Jsrsasign

CVE-2026-40941

Cacti: Package Import Signature Validation Bypass Allows Self-Signed Packages

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have a package import signature validation bypass allows which allows self-signed packages. This issue has been fixed in version 1.2.31.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

Cacti

Products

Cacti

CVE-2026-6331

HMAC zero-length tag forgery in EVP_DigestVerifyFinal

HMAC zero-length tag forgery in EVP_DigestVerifyFinal, where a zero-length tag could be accepted as valid during HMAC verification. In the OpenSSL-compatibility HMAC verify path the supplied signature length was only checked as not exceeding the MAC length, so a zero-length or otherwise truncated tag could pass verification. The fix requires the supplied tag length to exactly equal the MAC length and rejects a zero-length MAC, so a forged short or empty tag is no longer accepted.

CVSS 4.0 · 2.1 Low EPSS < 1% KEV · Not listed

Vendors

Wolfssl

Products

Wolfssl

CVE-2026-11800

Org.keycloak:keycloak-services: keycloak: authentication bypass via jwt algorithm confusion

A flaw was found in Keycloak. This JWT algorithm confusion vulnerability in the JWT Authorization Grant flow allows an attacker with valid client credentials to bypass signature verification. By forging an assertion, the attacker can create unauthorized access tokens. This enables the attacker to impersonate any federated user linked to the affected Identity Provider, leading to unauthorized access and potential privilege escalation.

CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Build Keycloak Build Of Keycloak Data Grid and 4 more

CVE-2026-7511

PKCS7_verify signer confusion allows forged signatures to be accepted

PKCS7_verify signer confusion allows forged signatures, where the signer associated with a signature is not correctly bound, permitting a forged signature to be accepted.

CVSS 4.0 · 5.9 Medium EPSS < 1% KEV · Not listed

Vendors

Wolfssl

Products

Wolfssl

CVE-2026-6329

PKCS#12 MAC verification uses attacker-controlled comparison length

PKCS#12 MAC verification uses an attacker-controlled comparison length, weakening the integrity check on the MAC and allowing a mismatched MAC to be accepted. The PKCS#12 verify path compared the locally computed HMAC against the MAC parsed from the PKCS#12 structure using a length taken directly from the attacker-supplied input, without first verifying that it equals the length of the digest actually produced by the configured algorithm. A truncated or zero-length stored MAC could therefore be accepted, defeating the integrity protection of the MAC.

CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed

Vendors

Wolfssl

Products

Wolfssl

CVE-2026-9779

ATEN Unizon doCryptoHugeFileToFile Improper Verification of Cryptographic Signature Remote Code Execution Vulnerability

ATEN Unizon doCryptoHugeFileToFile Improper Verification of Cryptographic Signature Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of ATEN Unizon. Authentication is required to exploit this vulnerability. The specific flaw exists within the updateWar method. The issue results from an incorrect implementation of cryptographic signature verification. An attacker can leverage this vulnerability to execute code in the context of SYSTEM. Was ZDI-CAN-28590.

CVSS 3.0 · 7.2 High EPSS < 1% KEV · Not listed

Vendors

Aten

Products

Unizon

CVE-2026-42743

WordPress Masteriyo - LMS plugin <= 2.1.8 - Broken Authentication vulnerability

Unauthenticated Broken Authentication in Masteriyo - LMS <= 2.1.8 versions.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Themegrill Wordpress

Products

Masteriyo Wordpress