CVE-2026-57122

PraisonAI is a multi-agent teams system. Prior to 4.6.59, the WhatsApp and Linear bot webhook handlers verify HMAC signatures only when WHATSAPPAPPSECRET or LINEARWEBHOOKSECRET is configured and otherwise parse and dispatch unsigned request bodies. A remote unauthenticated client that reaches the...

CVE-2026-57122 PraisonAI: Webhook signature verification skipped (fail-open) when secret unset, allowing forged inbound webhooks (WhatsApp & Linear bots)

PraisonAI is a multi-agent teams system. Prior to 4.6.59, the WhatsApp and Linear bot webhook handlers verify HMAC signatures only when WHATSAPPAPPSECRET or LINEARWEBHOOKSECRET is configured and otherwise parse and dispatch unsigned request bodies. A remote unauthenticated client that reaches the...

CVE-2026-57122

PraisonAI (a multi-agent LLM framework) is vulnerable to fail-open webhook signature verification in its WhatsApp and Linear bot adapters prior to 4.6.59 . When WHATSAPP_APP_SECRET or LINEAR_WEBHOOK_SECRET is unset—the default on a fresh install —the _handle_webhook handler skips HMAC-SHA256 veri...

ruby-jwt: ruby-jwt: Authentication bypass due to empty key in HMAC verification

A flaw was found in ruby-jwt, a Ruby implementation of the RFC 7519 OAuth JSON Web Token JWT standard. A remote attacker can exploit this vulnerability by crafting a malicious token that is accepted due to an empty key being used in the HMAC Hash-based Message Authentication Code digest calculati...

ruby-jwt: ruby-jwt: Authentication bypass due to empty key in HMAC verification

A flaw was found in ruby-jwt, a Ruby implementation of the RFC 7519 OAuth JSON Web Token JWT standard. A remote attacker can exploit this vulnerability by crafting a malicious token that is accepted due to an empty key being used in the HMAC Hash-based Message Authentication Code digest calculati...

ruby-jwt: ruby-jwt: Authentication bypass due to empty key in HMAC verification

A flaw was found in ruby-jwt, a Ruby implementation of the RFC 7519 OAuth JSON Web Token JWT standard. A remote attacker can exploit this vulnerability by crafting a malicious token that is accepted due to an empty key being used in the HMAC Hash-based Message Authentication Code digest calculati...

ruby-jwt: ruby-jwt: Authentication bypass due to empty key in HMAC verification

A flaw was found in ruby-jwt, a Ruby implementation of the RFC 7519 OAuth JSON Web Token JWT standard. A remote attacker can exploit this vulnerability by crafting a malicious token that is accepted due to an empty key being used in the HMAC Hash-based Message Authentication Code digest calculati...

Phalcon: Non-constant-time HMAC verification in `Encryption\Crypt::decrypt` (timing side-channel)

Summary Phalcon\Encryption\Crypt provides authenticated encryption: when useSigning is enabled the default, encrypt appends an HMAC tag and decrypt verifies it before returning the plaintext. The verification compares the attacker-supplied tag against the freshly computed HMAC using PHP/Zephir...

GHSA-8JQH-95G6-7JPJ Phalcon: Non-constant-time HMAC verification in `Encryption\Crypt::decrypt` (timing side-channel)

Summary Phalcon\Encryption\Crypt provides authenticated encryption: when useSigning is enabled the default, encrypt appends an HMAC tag and decrypt verifies it before returning the plaintext. The verification compares the attacker-supplied tag against the freshly computed HMAC using PHP/Zephir...

CVE-2026-72861 Appwrite Templates github-issue-bot Skips Webhook Signature Verification When the X-Hub-Signature-256 Header Is Absent

The github-issue-bot templates in appwrite/templates verify the GitHub webhook signature with an inverted condition. verifyWebhook in node/github-issue-bot/src/github.js and in node-typescript/github-issue-bot/src/github.ts returns "typeof signature !== 'string' || await verify...", so when the...

Security update for perl-Mojo-JWT (moderate)

openSUSE Security Update: Security update for perl-Mojo-JWT Announcement ID: openSUSE-SU-2026:0279-1 Rating: moderate References: 1271935 Cross-References: CVE-2026-9537 Affected Products: openSUSE Backports SLE-15-SP7 An update that fixes one vulnerability is now available. Description: This...

EUVD-2026-53920

aiosend is a synchronous and asynchronous Crypto Pay API client. Pror to version 3.0.7, WebhookHandler.feedupdate deserializes the entire request body before verifying the HMAC signature. This allows an unauthenticated attacker to force expensive parsing of arbitrary JSON payloads that will...

CVE-2026-44978 xrdp: Unchecked FIPS padding length in standard RDP Security causes heap out-of-bounds read in HMAC verification

xrdp is an open source RDP server. Versions 0.10.6 and prior contain a heap out-of-bounds read vulnerability within the FIPS-specific receive paths. This vulnerability does not affect the default configuration of xrdp. The vulnerability is only exploitable when the security layer is set to...

DEBIAN-CVE-2026-49852

joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption JOSE standards. Prior to 1.6.8, joserfc.jwt.decode accepts attacker-forged HMAC-signed tokens when the caller-supplied verification key is the empty string or None, because HMACAlgorithm.sign...

UBUNTU-CVE-2026-9537

Mojo::JWT versions before 1.02 for Perl verify HMAC signatures with a non-constant-time string comparison. The decode method compares the supplied signature to the recomputed HMAC with Perl's eq operator, which stops at the first differing byte, so the comparison time varies with the number of...

CVE-2026-9537

Mojo::JWT versions before 1.02 for Perl verify HMAC signatures with a non-constant-time string comparison. The decode method compares the supplied signature to the recomputed HMAC with Perl's eq operator, which stops at the first differing byte, so the comparison time varies with the number of...

CVE-2026-9537 Mojo::JWT versions before 1.02 for Perl verify HMAC signatures with a non-constant-time string comparison

Mojo::JWT versions before 1.02 for Perl verify HMAC signatures with a non-constant-time string comparison. The decode method compares the supplied signature to the recomputed HMAC with Perl's eq operator, which stops at the first differing byte, so the comparison time varies with the number of...

CVE-2026-45363

ruby-jwt is a Ruby implementation of the RFC 7519 OAuth JSON Web Token standard. Prior to 2.10.3 and 3.2.0, JWT.decodetoken, '', true, algorithm: 'HS256' accepts an attacker-forged token because OpenSSL::HMAC.digest'SHA256', '', payload returns a valid digest under an empty key and no empty-key...

CVE-2026-45755 Symfony: Mailtrap Mailer Webhook Parser Never Verifies the X-Mt-Signature HMAC — Unauthenticated Webhook Event Injection

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 7.4.12 and 8.0.12, MailtrapRequestParser::doParse received the configured webhook secret but ignored the X-Mt-Signature HMAC header, allowing unauthenticated POST requests to inject forged...

PYSEC-2026-2528 joserfc: HS256/HS384/HS512 verify accepts empty/nil HMAC key (cross-language sibling of CVE-2026-45363)

Summary joserfc.jwt.decode accepts attacker-forged HMAC-signed tokens when the caller-supplied verification key is the empty string or None. HMACAlgorithm.sign and HMACAlgorithm.verify in src/joserfc/rfc7518/jwsalgs.py:62-70 feed whatever OctKey.getopkey... produced into hmac.new..., and...