Read the docs
TI-2026-65083 Aliases CVE-2026-101050GHSA-2x2v-2gpw-j9ff

Heym before 0.0.53 Authentication Bypass via Telegram Webhook

Priority HIGH 69CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
Low · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0038 32nd percentileScored 2026-11-07
Fix Fixed heym (heymrun): 0.0.53

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
heymrunheymbefore 0.0.530.0.53Patch availableCNA
  • heym Vendorheymrun Affected before 0.0.53 Fixed in 0.0.53 Patch available CNA

Remediation

  • Fix · CNA heym (heymrun) Fixed in 0.0.53

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    heymrun heym — GitHub Security Advisory (GHSA-pm6h-x3h5-j38h)

    3 records Highest priority Priority HIGH 3 HIGH

    Other records, highest priority first

    • TI-2026-65003 Heym before 0.0.53 Remote Code Execution via eval() Sandbox EscapePriority HIGH 73
    • TI-2026-65082 Heym before 0.0.53 Slack Webhook Signature Verification BypassPriority HIGH 69
    Show all 3 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-101050
  2. 2026-10-03 Alias added: GHSA-2x2v-2gpw-j9ff

References

Patch 1

Advisory 1

  • TI-2026-71768 Sandbox escape in heym Python tool allows command execution CVSS 3.1HIGH 8.8
  • TI-2026-65003 Heym before 0.0.53 Remote Code Execution via eval() Sandbox Escape CVSS 4.0HIGH 8.7
  • TI-2026-65002 heym before 0.0.91 Remote Code Execution via Expression Engine CVSS 4.0HIGH 8.7
  • TI-2026-33042 Heym < 0.0.21 Sandbox Escape via Python Introspection CVSS 4.0HIGH 8.7
  • TI-2026-65082 Heym before 0.0.53 Slack Webhook Signature Verification Bypass CVSS 4.0HIGH 8.3
  • TI-2026-64996 heym before 0.0.109 Server-Side Request Forgery via Workflow Nodes CVSS 4.0HIGH 7.6
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences