Vulnerability · Published Sep 27, 2026 · Assigned by VulnCheck
CVE-2026-101050Heym before 0.0.53 Authentication Bypass via Telegram Webhook
Medium 6.5
In plain English
A medium-severity improper authentication in heym from heymrun. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.4%top 67.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
Heym before 0.0.53 fails to verify the X-Telegram-Bot-Api-Secret-Token header on Telegram webhook endpoints when credential_id is absent or secret_token is empty. Remote unauthenticated attackers can post forged Telegram updates to trigger workflows with the owner's configured credentials and execute actions on attacker-supplied input.
Affected products (as reported)
Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
References
- GitHub Security Advisory (GHSA-pm6h-x3h5-j38h) vendor-advisory
- Patch Commit patch
- VulnCheck Advisory: Heym before 0.0.53 Authentication Bypass via Telegram Webhook third-party-advisory