JasonLovesDoggo Abacus up to 1.3.x /stream resource consumption

Summaryinfo

A vulnerability categorized as problematic has been discovered in JasonLovesDoggo Abacus up to 1.3.x. This issue affects some unknown processing of the file /stream. Executing a manipulation can lead to resource consumption. This vulnerability is registered as CVE-2025-27421. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in JasonLovesDoggo Abacus up to 1.3.x and classified as problematic. This vulnerability affects an unknown functionality of the file /stream. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. CVE summarizes:

Abacus is a highly scalable and stateless counting API. A critical goroutine leak vulnerability has been identified in the Abacus server's Server-Sent Events (SSE) implementation. The issue occurs when clients disconnect from the /stream endpoint, as the server fails to properly clean up resources and terminate associated goroutines. This leads to resource exhaustion where the server continues running but eventually stops accepting new SSE connections while maintaining high memory usage. The vulnerability specifically involves improper channel cleanup in the event handling mechanism, causing goroutines to remain blocked indefinitely. This vulnerability is fixed in 1.4.0.

The advisory is available at github.com. This vulnerability was named CVE-2025-27421 since 02/24/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 1.4.0 eliminates this vulnerability.

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Productinfo

Vendor

• JasonLovesDoggo

Name

• Abacus

Version

• 1.0
• 1.1
• 1.2
• 1.3

Website

• Product: https://github.com/JasonLovesDoggo/abacus/

CPE 2.3info

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