CVE-2025-27421 (GCVE-0-2025-27421)

Vulnerability from cvelistv5 – Published: 2025-03-03 16:19 – Updated: 2025-03-03 16:41
VLAI
Title
Goroutine Leak in Abacus SSE Implementation
Summary
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-03 16:40 UTC
CWE
  • CWE-400 - Uncontrolled Resource Consumption
  • CWE-772 - Missing Release of Resource after Effective Lifetime
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
JasonLovesDoggo abacus Affected: < 1.4.0
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