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CVE-2026-54635

7.5 · HIGH

pytonapi is a Python SDK for TONAPI that provides REST API, streaming, and webhook access to the TON blockchain.

Published Jul 28, 2026CWE-287EPSS 0.71%

Overview

CVE-2026-54635 is a high-severity vulnerability. It was published on July 28, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

pytonapi is a Python SDK for TONAPI that provides REST API, streaming, and webhook access to the TON blockchain. From 2.0.0 to 2.2.0, TonapiWebhookDispatcher fails to validate the Authorization header when a webhook handler is registered with the documented path argument, because setup() stores bearer tokens only under the default suffix paths and never adds the custom path to the token map, so self._tokens.get(path) returns None and the authentication guard is skipped. An unauthenticated remote attacker can POST forged payloads to the custom webhook endpoint and trigger victim-defined handlers. This issue is fixed in version 2.2.1.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/nessshon/tonapi/commit/854222b7ee68d3fb7b4d6d899d200f388483bd86GitHubgithub.com/nessshon/tonapi/releases/tag/v2.2.1GitHubgithub.com/nessshon/tonapi/security/advisories/GHSA-3fcr-jvgp-7f58GitHubgithub.com/pypa/advisory-database/tree/main/vulns/pytonapi/PYSEC-2026-3614.yamlGitHubgithub.com/nessshon/tonapi/security/advisories/GHSA-3fcr-jvgp-7f58

How CyberStrike helps

Frequently asked questions

What is CVE-2026-54635?

CVE-2026-54635 is a high-severity vulnerability. It was published on July 28, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-54635?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-54635?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-54635?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-54635 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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