Vulnerability · Published Oct 20, 2026 · Assigned by VulDB

CVE-2026-113704a2aproject a2a-rs Push Notification push_notification_sender.rs HttpPushSender server-side request forgery

High 7.3

In plain English

A high-severity server-side request forgery in a2a-rs from a2aproject. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities).

Severity (CVSS 3.1)7.3High

Exploit odds (30 days)0.5%top 56.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A vulnerability has been found in a2aproject a2a-rs up to 0.4.3. This affects the function HttpPushSender of the file crates/server/src/push_notification_sender.rs of the component Push Notification Handler. Such manipulation of the argument TaskPushNotificationConfig leads to server-side request forgery. The attack may be launched remotely. The name of the patch is 2ba50176ea9f222d9a7d0f0e8cfe6fae7cf4c224. Applying a patch is advised to resolve this issue.

Affected products (as reported)

Vendor	Product	Versions
a2aproject	a2a-rs	0.4.00.4.10.4.20.4.3

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C

References

VDB-422865 | a2aproject a2a-rs Push Notification push_notification_sender.rs HttpPushSender server-side request forgery vdb-entry, technical-description
VDB-422865 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-113704 | CVE Analysis and Report third-party-advisory
Submit #1014883 | a2aproject a2a-rs a2a-server-lf ≤ 0.4.3 SSRF third-party-advisory
https://github.com/a2aproject/a2a-rs/pull/124 issue-tracking, patch
https://github.com/a2aproject/a2a-rs/commit/2ba50176ea9f222d9a7d0f0e8cfe6fae7cf4c224 patch
https://github.com/a2aproject/a2a-rs/ product