CVE-2026-8080-DKIM-Signature-Verification-Bypass-Header-Canonicalization-Flaw-

CVE-2026-8080 – DKIM Signature Verification Bypass Header Canonicalization Flaw Program Code Python email parsing simulation dkimverifiersim.py - Flawed DKIM verifier import re, hashlib Simulated email with DKIM signature rawemail = b"""From: [email protected] To: [email protected]...

EUVD-2026-86510

MinIO through 7aac2a2 does not verify that every x-amz- header present on a request also appears in the client-supplied X-Amz-SignedHeaders list. extractSignedHeaders in cmd/signature-v4-utils.go iterates only the claimed list and never enumerates the headers that actually arrived, and thus a...

BIT-CEPH-2026-54330 Ceph RGW SigV4 handler accepts unsigned x-amz-* headers on presigned requests, allowing privilege escalation

Ceph is an open-source distributed storage platform providing object, block, and file storage. In versions prior to 20.2.4 and 19.2.6, the Ceph Object Gateway RGW SigV4 handler does not reject requests that carry x-amz- headers absent from the signed header set, allowing anyone holding a presigne...

BIT-KEYCLOAK-2026-16093 Keycloak-services: keycloak-services: required signed-jwt assertion policy can be bypassed with unsigned assertion headers

Keycloak provides a mechanism called Client Policies to enforce security requirements on clients, such as requiring them to use signed JWTs for authentication. A flaw was discovered where this enforcement can be bypassed. An attacker with valid client credentials can provide a fake, unsigned...

AZL-98340 CVE-2026-54330 affecting package ceph for versions less than 18.2.2-13

Ceph is an open-source distributed storage platform providing object, block, and file storage. In versions prior to 20.2.4 and 19.2.6, the Ceph Object Gateway RGW SigV4 handler does not reject requests that carry x-amz- headers absent from the signed header set, allowing anyone holding a presigne...

CVE-2026-54330

CVE-2026-54330 affects the Ceph Object Gateway (RGW) SigV4 verifier in versions prior to 20.2.4 and 19.2.6 . The handler fails to reject requests carrying x-amz-* headers that are absent from the signed header set, unlike AWS S3 which rejects such unsigned headers. An attacker holding a presigned...

CVE-2026-54330 Ceph RGW SigV4 handler accepts unsigned x-amz-* headers on presigned requests, allowing privilege escalation

Ceph is an open-source distributed storage platform providing object, block, and file storage. In versions prior to 20.2.4 and 19.2.6, the Ceph Object Gateway RGW SigV4 handler does not reject requests that carry x-amz- headers absent from the signed header set, allowing anyone holding a presigne...

CVE-2026-54330 Ceph RGW SigV4 handler accepts unsigned x-amz-* headers on presigned requests, allowing privilege escalation

Ceph is an open-source distributed storage platform providing object, block, and file storage. In versions prior to 20.2.4 and 19.2.6, the Ceph Object Gateway RGW SigV4 handler does not reject requests that carry x-amz- headers absent from the signed header set, allowing anyone holding a presigne...

EUVD-2026-67276

Ceph is an open-source distributed storage platform providing object, block, and file storage. In versions prior to 20.2.4 and 19.2.6, the Ceph Object Gateway RGW SigV4 handler does not reject requests that carry x-amz- headers absent from the signed header set, allowing anyone holding a presigne...

CVE-2026-54330

Ceph is an open-source distributed storage platform providing object, block, and file storage. In versions prior to 20.2.4 and 19.2.6, the Ceph Object Gateway RGW SigV4 handler does not reject requests that carry x-amz- headers absent from the signed header set, allowing anyone holding a presigne...

CVE-2026-54330 Ceph RGW SigV4 handler accepts unsigned x-amz-* headers on presigned requests, allowing privilege escalation

Ceph is an open-source distributed storage platform providing object, block, and file storage. In versions prior to 20.2.4 and 19.2.6, the Ceph Object Gateway RGW SigV4 handler does not reject requests that carry x-amz- headers absent from the signed header set, allowing anyone holding a presigne...

CVE-2026-54330

A flaw was found in Ceph RGW's SigV4 signature verification handler. When processing S3 requests, RGW verifies only the headers explicitly listed in the X-Amz-SignedHeaders field but does not reject requests that carry additional unsigned x-amz- headers. This diverges from the AWS S3 specificatio...

CVE-2026-71191

A flaw was found in the S3API middleware of OpenStack Swift. The SigV4 presigned URL implementation does not require that semantic x-amz- headers be included in the request signature. An attacker who obtains a presigned PUT URL can inject unsigned headers such as X-Amz-Copy-Source to copy objects...

WS-2026-0022

NodeBB before v4.14.0: upvote inflation via unchecked actor - ActivityPub POST requests without an HTTP signature header were accepted, letting an unchecked actor inflate upvotes and perform other actor-attributed actions. Fixed in 4.14.0 by rejecting unsigned POSTs. One of eight Aikido-disclosed...