Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- https://github.com/nessshon/tonapi/commit/854222b7ee68d3fb7b4d6d899d200f388483bd
- https://github.com/nessshon/tonapi/releases/tag/v2.2.1
- https://github.com/nessshon/tonapi/security/advisories/GHSA-3fcr-jvgp-7f58
- https://github.com/nessshon/tonapi/security/advisories/GHSA-3fcr-jvgp-7f58
FAQ
What is CVE-2026-54635?
CVE-2026-54635 is a vulnerability with a CVSS score of 7.5 (HIGH). 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...
How severe is CVE-2026-54635?
CVE-2026-54635 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-54635?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.