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TI-2026-83134 Aliases CVE-2026-119660GHSA-77p8-2qmx-794p

Authentication bypass in MuseBot via hard-coded session key

Priority HIGH 81CWE-1394Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

MuseBot before 2.0.0 by yincongcyincong contains an authentication bypass because it uses the hard-coded default session key 'muse_bot_session_key'. An unauthenticated remote attacker can sign a session cookie with that key and set a user_id to gain full administrative access. The attacker can then read password hashes, chat records and bot configuration, and stop bots. The weakness is classified as CWE-1394.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

MuseBot before 2.0.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to forge admin sessions by using the hard-coded default session_key 'muse_bot_session_key'. Attackers can sign a MuseBot-session cookie carrying a user_id to gain full administrative access, reading password hashes, chat records, and bot configuration, and stopping bots.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0052 44th percentileScored 2026-11-07
Fix Fixed MuseBot (yincongcyincong): 2.0.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
yincongcyincongMuseBotbefore 2.0.02.0.0Patch availableCNA
  • MuseBot Vendoryincongcyincong Affected before 2.0.0 Fixed in 2.0.0 Patch available CNA

Remediation

MuseBot 2.0.0 fixes this issue, so upgrade to 2.0.0 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

  • Fix · CNA MuseBot (yincongcyincong) Fixed in 2.0.0

Timeline

  1. 2026-10-30 Threatist record created from CVE-2026-119660
  2. 2026-10-30 Alias added: GHSA-77p8-2qmx-794p
  3. 2026-11-05 CISA SSVC decision points changed
  4. 2026-11-05 Priority changed: MEDIUM → HIGH

References

Patch 2

Advisory 1

Other 4

Sources

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