A vulnerability was determined in a2aproject a2a-go up to 2.4.0. Impacted is an unknown function of the file a2asrv/rest.go of the component REST SSE handler. This manipulation causes resource consumption. It is possible to initiate the attack remotely. Upgrading to version 2.5.0 is recommended to address this issue. Patch name: ff6035bd21e44bb3ee1bfa547885b8c08327fa01. It is recommended to upgrade the affected component.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
A2aproject
  • A2a-go

No data.

No data.

References
Link Providers
https://github.com/a2aproject/a2a-go/ cve-icon cve-icon
https://github.com/a2aproject/a2a-go/commit/ff6035bd21e44bb3ee1bfa547885b8c08327fa01 cve-icon cve-icon
https://github.com/a2aproject/a2a-go/pull/396 cve-icon cve-icon
https://github.com/a2aproject/a2a-go/releases/tag/v2.5.0 cve-icon cve-icon
https://vuldb.com/cve/CVE-2026-117503 cve-icon cve-icon
https://vuldb.com/submit/1015052 cve-icon cve-icon
https://vuldb.com/vuln/427070 cve-icon cve-icon
https://vuldb.com/vuln/427070/cti cve-icon cve-icon
History

Mon, 02 Nov 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 27 Oct 2026 14:00:00 +0000

Type Values Removed Values Added
Description A vulnerability was determined in a2aproject a2a-go up to 2.4.0. Impacted is an unknown function of the file a2asrv/rest.go of the component REST SSE handler. This manipulation causes resource consumption. It is possible to initiate the attack remotely. Upgrading to version 2.5.0 is recommended to address this issue. Patch name: ff6035bd21e44bb3ee1bfa547885b8c08327fa01. It is recommended to upgrade the affected component.
Title a2aproject a2a-go REST SSE handler rest.go resource consumption
First Time appeared A2aproject
A2aproject a2a-go
Weaknesses CWE-400
CWE-404
CPEs cpe:2.3:a:a2aproject:a2a-go:*:*:*:*:*:*:*:*
Vendors & Products A2aproject
A2aproject a2a-go
References
Metrics cvssV2_0

{'score': 5, 'vector': 'AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:OF/RC:C'}

cvssV3_0

{'score': 5.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C'}

cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2026-10-27T13:45:17.953Z

Updated: 2026-11-02T16:03:13.590Z

Reserved: 2026-10-27T08:47:20.319Z

Link: CVE-2026-117503

cve-icon Vulnrichment

Updated: 2026-11-02T16:03:07.773Z

cve-icon NVD

Status : Deferred

Published: 2026-10-27T14:16:35.117

Modified: 2026-11-02T16:17:29.857

Link: CVE-2026-117503

cve-icon Redhat

No data.