What is CVE-2026-101050?

CVE-2026-101050 is a medium-severity vulnerability in Heymrun Heym, classified under Improper Authentication. CVSS score: 6.5/10. Published 2026-09-27.

How severe is CVE-2026-101050?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Heymrun Heym

CVE-2026-101050

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.

Vulnerability class: Broken Authentication

Published 2026-09-27.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Heymrun Heym

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

github.com/heymrun/heym/security/advisories/GHSA-pm6h-x3h5-j38h (vendor-advisory)
github.com/heymrun/heym/commit/341d1012367cd74f85c617e1c98dd49e3fcb5e83 (patch)
www.vulncheck.com/advisories/heym-before-0.0.53-authentication-bypass-via-teleg… (third-party-advisory)

Frequently asked questions

What is CVE-2026-101050?: CVE-2026-101050 is a medium-severity vulnerability in Heymrun Heym, classified under Improper Authentication. CVSS score: 6.5/10. Published 2026-09-27.
How severe is CVE-2026-101050?: Medium severity. CVSS v3 base score is 6.5 out of 10.