Medium severity · published Oct 27, 2026
CVE-2026-117504
a2aproject a2a-go Distributed Manager distributed_manager.go Cancel denial of service
New
5.3
CVSS
–
EPSS
No
On KEV
Description
A vulnerability was identified in a2aproject a2a-go up to 2.4.0. The affected element is the function Cancel of the file internal/taskexec/distributed_manager.go of the component Distributed Manager. Such manipulation leads to denial of service. It is possible to launch the attack remotely. Upgrading to version 2.5.0 is sufficient to fix this issue. The name of the patch is 14e41a978b31e134ffa1170d8657f9dd98529aa3. Upgrading the affected component is advised.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
A2
a2a-go · a2aproject
2.0; 2.1; 2.2; 2.3; 2.4.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-117504
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-117504
github.com
https://github.com/a2aproject/a2a-go/
github.com
https://github.com/a2aproject/a2a-go/commit/14e41a978b31e134ffa1170d8657f9dd98529aa3
github.com
https://github.com/a2aproject/a2a-go/pull/409
github.com
https://github.com/a2aproject/a2a-go/releases/tag/v2.5.0
vuldb.com
https://vuldb.com/cve/CVE-2026-117504
vuldb.com
https://vuldb.com/submit/1015053
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