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CVE-2026-56835— PraisonAI Slack app_mention bypasses configured user/channel authorization

Quick assessment

Affected
MervinPraison PraisonAI
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PraisonAI 是一个多智能体团队协作系统。在版本 3.11.0 至 4.6.59（不含）期间，PraisonAI 的 Slack 机器人会在常规的 Slack 消息事件处理器中应用其配置的 allowed_users（允许用户）、allowed_channels（允许频道）以及未知用户配对策略，但未在相邻的 Slack app_mention 事件处理器中应用这些策略。因此，任何能够在该 Slack 应用所在频道中提及该机器人的 Slack 工作区用户，均可触发已配置的 PraisonAI 智能体，即使满足以

CVSS 8.3 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
MervinPraison PraisonAI >= 3.11.0, < 4.6.59 affected
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I. Basic Information for CVE-2026-56835

Vulnerability Information
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Vulnerability Title
PraisonAI Slack app_mention bypasses configured user/channel authorization
Source: CVE Program / CVE List V5
Vulnerability Description
PraisonAI is a multi-agent teams system. From version 3.11.0 to before version 4.6.59, PraisonAI's Slack bot applies its configured allowed_users, allowed_channels, and unknown-user pairing policy in the normal Slack message event handler, but not in the adjacent Slack app_mention event handler. A Slack workspace user who can mention the bot in a channel where the Slack app is present can trigger the configured PraisonAI agent even when: the sender is not in BotConfig.allowed_users; the channel is not in BotConfig.allowed_channels; unknown_user_policy="deny" is configured; and the same event content is correctly dropped by the normal message handler. This issue has been patched in version 4.6.59.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
MervinPraison PraisonAI >= 3.11.0, < 4.6.59 -

II. Public POCs for CVE-2026-56835

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III. Intelligence Information for CVE-2026-56835

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Vendor Advisories for CVE-2026-56835 (1)

Same Patch Batch · MervinPraison · 2026-10-23 · 16 CVEs total

CVE-2026-57116 9.8 CRITICAL PraisonAI: AgentOS remains unauthenticated after GHSA-pm96 patched version and allows remo
CVE-2026-56832 8.8 HIGH PraisonAI DiscordApproval accepts unrelated channel messages as dangerous-tool approvals
CVE-2026-56840 8.8 HIGH PraisonAI: HTTPApproval dashboard renders tool arguments as raw HTML, allowing approval-pa
CVE-2026-57117 8.8 HIGH PraisonAI: Compute-bridged file tools allow shell command injection
CVE-2026-57144 8.8 HIGH PraisonAI SandlockSandbox falls back to unrestricted subprocess execution when Landlock is
CVE-2026-56837 8.6 HIGH PraisonAI LinearBot processes unsigned webhooks when LINEAR_WEBHOOK_SECRET is missing
CVE-2026-56836 8.2 HIGH PraisonAI recipe serve Typer command bypasses the non-localhost authentication guard
CVE-2026-57113 8.1 HIGH PraisonAI GitHub template cache path traversal allows outside-cache file write and directo
CVE-2026-57121 8.1 HIGH PraisonAI: Missing ownership check on DELETE endpoints allows members to delete others' co
CVE-2026-56838 7.8 HIGH PraisonAI recipe.run_stream skips dangerous-tool policy enforcement
CVE-2026-57142 7.8 HIGH PraisonAI recipe workflow policy can be bypassed by declaring and YAML-approving dangerous
CVE-2026-56833 7.5 HIGH PraisonAI Dynamic Context history and terminal tools read files outside configured storage
CVE-2026-56834 7.5 HIGH PraisonAI dynamic-context artifact tools read arbitrary host files outside artifact storag
CVE-2026-57146 7.5 HIGH PraisonAI A2U incomplete authentication fix leaves current serve command unauthenticated b
CVE-2026-57114 7.2 HIGH PraisonAI: Jobs webhook SSRF protection bypass via DNS rebinding

IV. Related Vulnerabilities

Same product: PraisonAI
Same vendor: MervinPraison
Same weakness: CWE-862

V. Comments for CVE-2026-56835

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