VYPR
High severityNVD Advisory· Published Jul 28, 2026· Updated Jul 28, 2026

pytonapi has a Webhook Custom Path Authentication Bypass

CVE-2026-54635

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.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
pytonapiPyPI
>= 2.0.0, < 2.2.12.2.1

Affected products

1

Patches

Vulnerability mechanics

References

5

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