CVE-2026-90562

HIGHPre-NVD 8.18.1—
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-13. a secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

LangBot before 4.10.11 generates password recovery keys with only 24 bits of entropy and applies no rate limiting to the unauthenticated reset-password endpoint. Remote attackers knowing the administrator email can exhaust the keyspace through concurrent requests to reset the admin password and gain account access.

CVSS v3
8.1
EG Score
8.1(high)
EG Risk
52(Track*)
EG Risk 52/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity81% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

September 13, 2026

Last Modified

September 16, 2026

Advisory Details (6)

Auto-updated Sep 13, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit.
generic

LangBot before 4.10.11 Authentication Bypass via Weak Recovery Key | Advisories | VulnCheck

https://www.vulncheck.com/advisories/langbot-before-4.10.11-authentication-bypass-via-weak-recovery-key
github_commit Patch Available

commit 267232c24f93 (langbot-app/LangBot)

Patch available: langbot-app/LangBot v4.10.11 (contains commit 267232c24f93)

https://github.com/langbot-app/LangBot/commit/267232c24f93c515d6fd3f7f81c0676066ab1ab8
generic

LangBot/src/langbot/pkg/api/http/controller/groups/user.py at v4.10.2 · langbot-app/LangBot · GitHub

https://github.com/langbot-app/LangBot/blob/v4.10.2/src/langbot/pkg/api/http/controller/groups/user.py
generic

LangBot/src/langbot/pkg/core/stages/genkeys.py at v4.10.2 · langbot-app/LangBot · GitHub

https://github.com/langbot-app/LangBot/blob/v4.10.2/src/langbot/pkg/core/stages/genkeys.py
generic

GitHub - langbot-app/LangBot: Production-grade platform for building agentic IM bots - 生产级多平台智能机器人开发平台/ Agent、知识库编排、插件系统 / Bots for Discord / Slack / LINE / Telegram / WeChat(企业微信, 企微智能机器人, 公众号) / 飞书 / 钉钉 / QQ / Matrix e.g. Integrated with ChatGPT(GPT), DeepSeek, Dify, n8n, Langflow, Coze, Claude, Gemini, GLM, Ollama, SiliconFlow, Moonshot, openclaw / hermes agent, deerflow · GitHub

https://github.com/langbot-app/LangBot
generic🟡 PoC Available

Unauthenticated admin account takeover via low-entropy (24-bit) recovery key and missing brute-force protection · Issue #2392 · langbot-app/LangBot · GitHub

https://github.com/langbot-app/LangBot/issues/2392

Vendor Advisories for CVE-2026-90562(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 28× in last 7d / 28× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 05:15 UTCEG score recompute
  2. 2026-09-19 05:15 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 16:54 UTCGHSA enrichment
  5. 2026-09-18 04:33 UTCEG score recompute
  6. 2026-09-18 04:33 UTCGHSA enrichment
  7. 2026-09-17 19:32 UTCEPSS rescore
  8. 2026-09-17 16:12 UTCGHSA enrichment
  9. 2026-09-17 03:51 UTCGHSA enrichment
  10. 2026-09-16 15:30 UTCEG score recompute
  11. 2026-09-16 15:30 UTCGHSA enrichment
  12. 2026-09-16 14:27 UTCEG score recompute
  13. 2026-09-16 14:27 UTCGHSA enrichment
  14. 2026-09-16 14:09 UTCEPSS rescore
  15. 2026-09-16 13:50 UTCEG score recompute
  16. 2026-09-16 13:50 UTCGHSA enrichment
  17. 2026-09-16 05:15 UTCEPSS rescore
  18. 2026-09-16 01:06 UTCGHSA enrichment
  19. 2026-09-15 12:45 UTCEG score recompute
  20. 2026-09-15 12:45 UTCGHSA enrichment
  21. 2026-09-15 03:12 UTCEPSS rescore
  22. 2026-09-15 00:24 UTCGHSA enrichment
  23. 2026-09-14 12:03 UTCGHSA enrichment
  24. 2026-09-13 23:42 UTCEG score recompute
  25. 2026-09-13 23:42 UTCGHSA enrichment
Show 3 more
  1. 2026-09-13 11:21 UTCEG score recompute
  2. 2026-09-13 10:50 UTCEG score recompute
  3. 2026-09-13 10:49 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-90562?
CVE-2026-90562 is a high vulnerability published on September 13, 2026. LangBot before 4.10.11 generates password recovery keys with only 24 bits of entropy and applies no rate limiting to the unauthenticated reset-password endpoint. Remote attackers knowing the administrator email can exhaust the keyspace through concurrent requests to reset the admin password and…
When was CVE-2026-90562 disclosed?
CVE-2026-90562 was first published in the National Vulnerability Database on September 13, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-90562 actively exploited?
CVE-2026-90562 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 63.7% of all scored CVEs.
What is the CVSS score of CVE-2026-90562?
CVE-2026-90562 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-90562?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-90562, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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