CVE-2026-119660

CRITICALPre-NVD 9.89.8
EchelonGraph scoreHIGH confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-10-30. A secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Elevated

Also known asEUVD-2026-114076 (ENISA EUVD) · GHSA-77p8-2qmx-794p (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.8Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
9.8
EG Score
9.8CRITICALhigh confidence
EG Risk
75
EG Risk 75/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
44th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track* at medium mission impactTrack at low, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

October 30, 2026

Last Modified

November 5, 2026

Advisory Details (8)

Auto-updated Nov 7, 2026
Patch available. Sources: github_commit.
Web page

MuseBot admin panel ships a hardcoded default session signing key that allows unauthenticated session forgery and full admin takeover - HackMD

https://hackmd.io/@hieuPenguinnn/musebot-admin-default-session-key-auth-bypass
Web page

MuseBot before 2.0.0 Authentication Bypass via Hard-Coded Session Key | Advisories | VulnCheck

https://www.vulncheck.com/advisories/musebot-before-2.0.0-authentication-bypass-via-hard-coded-session-key
Web page

Security vulnerability in yincongcyincong/MuseBot: please review the report and fix · Issue #61 · yincongcyincong/MuseBot · GitHub

https://github.com/yincongcyincong/MuseBot/issues/61
GitHub commit Patch Available

commit 3e64518948fe (yincongcyincong/MuseBot)

Patch available: yincongcyincong/MuseBot v2.0.0 (contains commit 3e64518948fe)

https://github.com/yincongcyincong/MuseBot/commit/3e64518948fe7037058f07ef987d35216c3f0cae
GitHub commit Patch Available

commit 139f6158b502 (yincongcyincong/MuseBot)

Patch available: yincongcyincong/MuseBot v2.0.1 (contains commit 139f6158b502)

https://github.com/yincongcyincong/MuseBot/commit/139f6158b50283b983d76976f593a3a09a064681
Web page

MuseBot/admin/controller/login.go at v1.0.42 · yincongcyincong/MuseBot · GitHub

https://github.com/yincongcyincong/MuseBot/blob/v1.0.42/admin/controller/login.go#L19-L88
Web page

MuseBot/admin/conf/conf.go at v1.0.42 · yincongcyincong/MuseBot · GitHub

https://github.com/yincongcyincong/MuseBot/blob/v1.0.42/admin/conf/conf.go#L28
Web page

GitHub - yincongcyincong/MuseBot: supports Telegram, Discord, Slack, Lark(飞书),钉钉, 企业微信, QQ, 微信, compatible with various LLMs including OpenAI, Gemini, DeepSeek, Doubao, and OpenRouter. It offers intelligent conversation, image generation, video creation, and more. Works seamlessly in both private chats and group settings. · GitHub

https://github.com/yincongcyincong/MuseBot

Vendor Advisories for CVE-2026-119660(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 15× in last 7d / 34× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

  1. 2026-11-13 16:50 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  2. 2026-11-13 03:49 UTCEchelonGraph re-scored
  3. 2026-11-13 03:49 UTCGHSA enrichmentGHSA-77p8-2qmx-794p · GitHub severity CRITICAL · GitHub CVSS 9.8
  4. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  5. 2026-11-12 03:14 UTCEchelonGraph re-scored
  6. 2026-11-12 03:14 UTCGHSA enrichmentGHSA-77p8-2qmx-794p · GitHub severity CRITICAL · GitHub CVSS 9.8
  7. 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  8. 2026-11-11 02:40 UTCGHSA enrichmentGHSA-77p8-2qmx-794p · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-11-11 01:20 UTCEchelonGraph re-scored
  10. 2026-11-11 01:20 UTCGHSA enrichmentGHSA-77p8-2qmx-794p · GitHub severity CRITICAL · GitHub CVSS 9.8
  11. 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  12. 2026-11-10 00:45 UTCEchelonGraph re-scored
  13. 2026-11-10 00:45 UTCGHSA enrichmentGHSA-77p8-2qmx-794p · GitHub severity CRITICAL · GitHub CVSS 9.8
  14. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  15. 2026-11-09 00:11 UTCEchelonGraph re-scored
  16. 2026-11-09 00:11 UTCGHSA enrichmentGHSA-77p8-2qmx-794p · GitHub severity CRITICAL · GitHub CVSS 9.8
  17. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  18. 2026-11-07 23:36 UTCEchelonGraph re-scored
  19. 2026-11-07 23:36 UTCGHSA enrichmentGHSA-77p8-2qmx-794p · GitHub severity CRITICAL · GitHub CVSS 9.8
  20. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  21. 2026-11-06 23:01 UTCEchelonGraph re-scored
  22. 2026-11-06 23:01 UTCGHSA enrichmentGHSA-77p8-2qmx-794p · GitHub severity CRITICAL · GitHub CVSS 9.8
  23. 2026-11-06 16:36 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  24. 2026-11-05 23:55 UTCOSV refresh
  25. 2026-11-05 22:26 UTCEchelonGraph re-scored
Show 27 more
  1. 2026-11-05 22:26 UTCGHSA enrichmentGHSA-77p8-2qmx-794p · GitHub severity CRITICAL · GitHub CVSS 9.8
  2. 2026-11-05 21:38 UTCEchelonGraph re-scored
  3. 2026-11-05 21:38 UTCGHSA enrichmentGHSA-77p8-2qmx-794p · GitHub severity CRITICAL · GitHub CVSS 9.8
  4. 2026-11-05 19:32 UTCEchelonGraph re-scored
  5. 2026-11-05 19:32 UTCGHSA enrichmentGHSA-77p8-2qmx-794p · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  7. 2026-11-04 18:58 UTCEchelonGraph re-scored
  8. 2026-11-04 18:58 UTCGHSA enrichmentGHSA-77p8-2qmx-794p · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  10. 2026-11-03 18:23 UTCEchelonGraph re-scored
  11. 2026-11-03 18:23 UTCGHSA enrichmentGHSA-77p8-2qmx-794p · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-11-03 16:46 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  13. 2026-11-02 21:11 UTCEchelonGraph re-scored
  14. 2026-11-02 21:11 UTCGHSA enrichmentGHSA-77p8-2qmx-794p · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  16. 2026-11-01 20:36 UTCEchelonGraph re-scored
  17. 2026-11-01 20:36 UTCGHSA enrichmentGHSA-77p8-2qmx-794p · GitHub severity CRITICAL · GitHub CVSS 9.8
  18. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  19. 2026-10-31 20:01 UTCEchelonGraph re-scored
  20. 2026-10-31 20:01 UTCGHSA enrichmentGHSA-77p8-2qmx-794p · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  22. 2026-10-30 19:27 UTCEchelonGraph re-scored
  23. 2026-10-30 19:27 UTCGHSA enrichmentGHSA-77p8-2qmx-794p · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-10-30 16:02 UTCENISA EUVD ID recordedEUVD-2026-114076 · Source: ENISA EUVD
  25. 2026-10-30 15:26 UTCEchelonGraph re-scored
  26. 2026-10-30 14:25 UTCEchelonGraph re-scoredFirst assessed: 9.8 CRITICAL
  27. 2026-10-30 14:25 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-119660?
CVE-2026-119660 is a critical-severity vulnerability; its CVE record was published on October 30, 2026. 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,…
When was CVE-2026-119660 made public?
CVE-2026-119660 was made public on October 22, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on October 30, 2026. EchelonGraph's copy of the record carries a last-modified date of November 5, 2026; the record at its source may have been updated since.
Is CVE-2026-119660 actively exploited?
CVE-2026-119660 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (44th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-119660?
CVE-2026-119660 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-119660?
A fix for CVE-2026-119660 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-119660 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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