Vulnerability · Published Oct 20, 2026 · Assigned by VulDB

CVE-2026-113705a2aproject a2a-rs error.rs information exposure

Medium 5.3

In plain English

A medium-severity information exposure 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 0.3% (higher than 26% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.3%top 73.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A vulnerability was determined in a2aproject a2a-rs up to 0.4.3. This issue affects some unknown processing of the file a2a-server/src/error.rs. Executing a manipulation can lead to information exposure through error message. The attack can be executed remotely. This patch is called 713b943af94ab2d521d483b841618b97a2e78a4d. A patch should be applied to remediate this issue.

Affected products (as reported)

Vendor	Product	Versions
a2aproject	a2a-rs	0.4.00.4.10.4.20.4.3

Weakness: CWE-209, CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:O/RC:C

References

VDB-422867 | a2aproject a2a-rs error.rs information exposure vdb-entry
VDB-422867 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-113705 | CVE Analysis and Report third-party-advisory
Submit #1014888 | a2aproject a2a-rs a2a-server-lf ≤ 0.4.3 CWE-209 third-party-advisory
https://github.com/a2aproject/a2a-rs/pull/127 issue-tracking, patch
https://github.com/a2aproject/a2a-rs/commit/713b943af94ab2d521d483b841618b97a2e78a4d patch
https://github.com/a2aproject/a2a-rs/ product