a2aproject a2a-rs inmemory.rs information disclosure

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.

Source published

20 Oct 2026 23:15:22 UTC

Source modified

27 Oct 2026 21:32:36 UTC

Observed here

27 Oct 2026 22:45:55 UTC

Source terms

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CVSS 4.0 · 5.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X

CVSS 3.1 · 3.5 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

CVSS 3.0 · 3.5 CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N/E:X/RL:O/RC:C

CVSS 2.0 · 4.0 AV:N/AC:L/Au:S/C:P/I:N/A:N/E:ND/RL:OF/RC:C