CVE-2026-77519

LOWCVSS 5.4 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

MaxKB is an open-source AI assistant for enterprise. In 2.10.2-lts and earlier, the /chat/api/mcp authentication path looks up an ApplicationApiKey using only its secret and active status, without enforcing the is_permanent and expire_time checks used by the standard chat API. A previously valid, non-permanent application key that remains active after expiration can initialize the MCP endpoint, list the published application's tool metadata, invoke tools/call, and create durable application_chat and application_chat_record state even though /chat/api/open rejects the same key. No fixed version is available as of this review.

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0.0/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-613

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

1 mentions across 1 observed day

What's happening

1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d

Referenced assets1 URL

By indicator

https://www.valtersit.com/cve/CVE-2026-77519

Full discourse1 post

Hugo | DevOps | Cybersecurity 🇱🇻@HugoValters19h
CVE-2026-77519 MaxKB 2.10.2-lts and earlier: expired API keys still authenticate to the MCP endpoint, exposing tool metadata and enabling tool calls. CVSS 5.4, patch status unknown. Review your keys and restrict MCP access now. https://www.valtersit.com/cve/CVE-2026-77519 #CVE #infosec #MaxKB #CVEALERT #CVE #infosec #Linux #XSS #valtersit #snippet #SysAdmin #cybersecurity #devsecops #devops #developer #100daysofcode #git #github #gitlab #redteam #blueteam #ethicalhacker #cybersecurityawareness #cybersecuritynews #cybersecuritytips #python #hacker #kali #ubuntu #debian #docker
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