Description

A flaw has been found in invariant-systems-ai aiir up to 1.7.0. The affected element is an unknown function of the component Policy Gate Handler. Executing a manipulation can lead to improper verification of cryptographic signature. The attack can be executed remotely. It is advisable to upgrade the affected component. The GitHub repository of this project is not available anymore. This vulnerability only affects products that are no longer supported by the maintainer.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.3",
  "pubDate": "2026-10-04T18:16:33.560Z",
  "pubdate": "2026-10-04T18:16:33.560Z",
  "executiveSummary": "A critical security vulnerability has been identified in the invariant-systems-ai aiir component, affecting all versions up to and including 1.7.0.\nThe flaw stems from improper verification of cryptographic signatures within the Policy Gate Handler component, which serves as a central mechanism for enforcing security policies.\nThis vulnerability is classified as an improper verification issue, allowing remote, unauthenticated attackers to bypass integrity checks by manipulating signed data payloads.\nThe successful exploitation of this flaw enables an attacker to inject unauthorized data or commands into the system, potentially leading to unauthorized access, privilege escalation, or complete compromise of the processing pipeline.\nGiven that the upstream GitHub repository is no longer accessible and the product is marked as end-of-life (EOL), there is no official vendor-supplied patch.\nThe absence of maintenance means that systems running aiir 1.7.0 or earlier are permanently exposed to this vulnerability, necessitating immediate migration to alternative, supported solutions to mitigate the risk of remote exploitation.",
  "technicalDetails": "The vulnerability resides within the Policy Gate Handler component of the invariant-systems-ai aiir framework. The root cause is a deficiency in the cryptographic validation logic responsible for verifying the authenticity and integrity of incoming data packets.\nIn a secure implementation, the Policy Gate Handler is expected to perform strict verification of digital signatures associated with incoming requests using pre-shared keys or a trusted Public Key Infrastructure (PKI). However, in versions up to 1.7.0, the handler fails to correctly validate the structural and cryptographic integrity of these signatures during the ingestion phase.\nAn attacker can exploit this by crafting a malicious payload that bypasses the verification logic. Since the handler does not verify the authenticity of the signature, it treats the manipulated input as trusted data. This manipulation allows the attacker to bypass access controls enforced by the policy engine.\nThe attack flow proceeds as follows: First, the attacker identifies a target endpoint monitored by the Policy Gate Handler. Second, the attacker transmits a specially crafted, unsigned or improperly signed request to the application. Third, the handler fails to trigger an error or reject the packet because the verification process is either bypassed or improperly implemented within the logic flow. Finally, the malicious payload is executed by the downstream system with the assumed authority of the Policy Gate Handler.\nThe network exposure is classified as remote, meaning the attacker does not require local access to the server. The lack of proper cryptographic enforcement means that even if a signature is present, it may be ignored or inadequately checked against the payload, rendering the cryptographic security controls ineffective.\nPost-exploitation impact is severe, as it facilitates unauthorized control over the logic delegated to the Policy Gate Handler. If the handler is integrated with other internal systems or decision-making processes, the attacker can manipulate those processes, leading to data exfiltration, service disruption, or further system infiltration."
}