Vulnerability · Published Oct 20, 2026 · Assigned by VulDB

CVE-2026-113706a2aproject a2a-rs inmemory.rs information disclosure

Low 3.5

In plain English

A low-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 0.2% (higher than 16% of all known vulnerabilities).

Severity (CVSS 3.1)3.5Low

Exploit odds (30 days)0.2%top 83.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A vulnerability was identified in a2aproject a2a-rs up to 0.4.3. Impacted is an unknown function of the file a2a-server/src/task_store/inmemory.rs. The manipulation of the argument historyLength leads to information disclosure. The attack is possible to be carried out remotely. The identifier of the patch is 68f1b7e772ae5d6c9e581ac9b48bcddd10fe70eb. To fix this issue, it is recommended to deploy a patch.

Affected products (as reported)

Vendor	Product	Versions
a2aproject	a2a-rs	0.4.00.4.10.4.20.4.3

Weakness: CWE-200, CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N/E:X/RL:O/RC:C

References

VDB-422868 | a2aproject a2a-rs inmemory.rs information disclosure vdb-entry, technical-description
VDB-422868 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-113706 | CVE Analysis and Report third-party-advisory
Submit #1015040 | a2aproject a2a-rs a2a-server-lf ≤ 0.4.3 CWE-200 third-party-advisory
https://github.com/a2aproject/a2a-rs/pull/122 issue-tracking, patch
https://github.com/a2aproject/a2a-rs/commit/68f1b7e772ae5d6c9e581ac9b48bcddd10fe70eb patch
https://github.com/a2aproject/a2a-rs/ product