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Search Results (5 CVEs found)

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CVE Vendors Products Updated CVSS v3.1
CVE-2026-27571 2 Linuxfoundation, Nats 2 Nats-server, Nats Server 2026-02-26 5.9 Medium
NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. The WebSockets handling of NATS messages handles compressed messages via the WebSockets negotiated compression. Prior to versions 2.11.2 and 2.12.3, the implementation bound the memory size of a NATS message but did not independently bound the memory consumption of the memory stream when constructing a NATS message which might then fail validation for size reasons. An attacker can use a compression bomb to cause excessive memory consumption, often resulting in the operating system terminating the server process. The use of compression is negotiated before authentication, so this does not require valid NATS credentials to exploit. The fix, present in versions 2.11.2 and 2.12.3, was to bounds the decompression to fail once the message was too large, instead of continuing on. The vulnerability only affects deployments which use WebSockets and which expose the network port to untrusted end-points.
CVE-2023-47090 1 Linuxfoundation 1 Nats-server 2024-11-21 6.5 Medium
NATS nats-server before 2.9.23 and 2.10.x before 2.10.2 has an authentication bypass. An implicit $G user in an authorization block can sometimes be used for unauthenticated access, even when the intention of the configuration was for each user to have an account. The earliest affected version is 2.2.0.
CVE-2022-28357 1 Linuxfoundation 1 Nats-server 2024-11-21 9.8 Critical
NATS nats-server 2.2.0 through 2.7.4 allows directory traversal because of an unintended path to a management action from a management account.
CVE-2020-26892 2 Fedoraproject, Linuxfoundation 2 Fedora, Nats-server 2024-11-21 9.8 Critical
The JWT library in NATS nats-server before 2.1.9 has Incorrect Access Control because of how expired credentials are handled.
CVE-2020-26521 2 Fedoraproject, Linuxfoundation 2 Fedora, Nats-server 2024-11-21 7.5 High
The JWT library in NATS nats-server before 2.1.9 allows a denial of service (a nil dereference in Go code).