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CVE-2026-119660

MuseBot before 2.0.0 Authentication Bypass via Hard-Coded Session Key

Products / packages yincongcyincong MuseBot

Published

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Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 08/11/2026, 03:15:33 UTC
VulnCheck · CVSS:4.0 · 9.3
Assessment vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
VulnCheck · CVSS:3.1 · 9.8
Assessment vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The headline uses the highest imported catalog score. Assessments can differ by source and CVSS version.

Severity

critical9.8

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Exploit reference published

Source-linked evidence; not proof of attacks in the wild or independent validation.

Remediation

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

What this means

MuseBot before 2.0.0 has an authentication bypass vulnerability via a hard-coded session key, allowing unauthenticated attackers to gain administrative access. The weakness is due to the use of a default cryptographic key. This may allow attackers to read sensitive data and stop bots.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

yincongcyincong · VulnCheck

MuseBot

1 range
VulnCheck version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → before 2.0.0

semver versions

unaffected

unknown

Other versions: unaffected

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

The sources identify public exploit references. We have not independently tested them; their availability does not establish exploitation in the wild.

hackmd.io/@hieuPenguinnn/musebot-admin-default-session-key-auth-bypass ↗Attributed to CISA-ADP

Original source description

Read the full publisher description

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.

References

8 sources
yincongcyincong/MuseBot · commit 3e64518
PatchVulnCheck
yincongcyincong/MuseBot · commit 139f615
PatchVulnCheck
yincongcyincong/MuseBot · issues/61
Source referenceVulnCheck
yincongcyincong/MuseBot · conf.go
Source referenceVulnCheck
yincongcyincong/MuseBot · login.go
Source referenceVulnCheck
hackmd.io/@hieuPenguinnn/musebot-admin-default-session-key-auth-bypass
Public exploit referenceVulnCheck · CISA-ADP
View 2 more references
yincongcyincong/MuseBot · repository
Source referenceVulnCheck
www.vulncheck.com/advisories/musebot-before-2.0.0-authentication-bypass-via-hard-coded-session-key
Security advisoryVulnCheck

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-119660

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-1394 ↗

Use of Default Cryptographic Key

VulnCheck

Related →
Contributing organizations · 2
VulnCheck

Assigning organization

2026-10-30
CISA-ADP

Additional data publisher

2026-11-05

Timeline

All times UTC

  1. Advisory published

    Publication date supplied by the source.

  2. Source updated

    Latest modification date supplied by the source.

  3. Last imported by cve.new

    Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes
  1. CVE · CVE-2026-119660

    Observed 2026-11-05T23:12:36.940Z · upstream updated 2026-11-05T21:34:06.489Z

    Prioritization updated

    before

    []

    after

    [
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-11-05T21:33:48.218500Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "poc"
      },
      {
        "name": "Automatable",
        "value": "yes"
      },
      {
        "name": "Technical Impact",
        "value": "total"
      }
    ]
  }
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.