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TI-2026-41400 Aliases CVE-2026-57495GHSA-fq4x-789w-jg5h

Missing authentication in agenticmail @agenticmail/core

Priority MEDIUM 44CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-306.

Summary

AgenticMail gives AI agents real email addresses and phone numbers. In @agenticmail/claudecode prior to version 0.2.39, @agenticmail/codex prior to version 0.1.33, @agenticmail/core prior to version 0.9.43, and @agenticmail/openclaw prior to version 0.5.71, two inbound-mail handlers act on a privileged effect without verifying that the sender is the operator, while a sibling handler in the same repo does. The higher-impact one: any external email routed to the bridge inbox causes the dispatcher to resume the operator's Claude Code session with `permissionMode: 'bypassPermissions'`, embedding the attacker-controlled `from`/`subject`/`preview` verbatim into the prompt the resumed agent reads — an indirect prompt injection into a fully-privileged agent (Bash/Write/Edit/WebFetch + the agenticmail MCP toolbelt) running as the operator's OAuth identity. The sibling operator-query email-reply hook gates the same untrusted-From provenance with `isOperatorReplySender(replyFrom, config.operatorEmail)` (fail-closed); the bridge-wake path — a strictly higher-privilege effect — has no equivalent. @agenticmail/claudecode 0.2.39, @agenticmail/codex 0.1.33, @agenticmail/core 0.9.43, and @agenticmail/openclaw 0.5.71 contain a fix.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00362 30th percentileScored 2026-11-07
Fix Fixed @agenticmail/core (agenticmail): 0.9.43@agenticmail/claudecode (agenticmail): 0.2.39+6 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
agenticmail@agenticmail/corebefore 0.9.430.9.43Patch availableCNA
agenticmail@agenticmail/claudecodebefore 0.2.390.2.39Patch availableCNA
agenticmail@agenticmail/codexbefore 0.1.330.1.33Patch availableCNA
agenticmail@agenticmail/openclawbefore 0.5.710.5.71Patch availableCNA
—@agenticmail/core (npm)before 0.9.430.9.43Patch availableGHSA-fq4x-789w-jg5h
—@agenticmail/claudecode (npm)before 0.2.390.2.39Patch availableGHSA-fq4x-789w-jg5h
—@agenticmail/codex (npm)before 0.1.330.1.33Patch availableGHSA-fq4x-789w-jg5h
—@agenticmail/openclaw (npm)before 0.5.710.5.71Patch availableGHSA-fq4x-789w-jg5h
  • @agenticmail/core Vendoragenticmail Affected before 0.9.43 Fixed in 0.9.43 Patch available CNA
  • @agenticmail/claudecode Vendoragenticmail Affected before 0.2.39 Fixed in 0.2.39 Patch available CNA
  • @agenticmail/codex Vendoragenticmail Affected before 0.1.33 Fixed in 0.1.33 Patch available CNA
  • @agenticmail/openclaw Vendoragenticmail Affected before 0.5.71 Fixed in 0.5.71 Patch available CNA
  • @agenticmail/core (npm) Vendor— Affected before 0.9.43 Fixed in 0.9.43 Patch available GHSA-fq4x-789w-jg5h
  • @agenticmail/claudecode (npm) Vendor— Affected before 0.2.39 Fixed in 0.2.39 Patch available GHSA-fq4x-789w-jg5h
  • @agenticmail/codex (npm) Vendor— Affected before 0.1.33 Fixed in 0.1.33 Patch available GHSA-fq4x-789w-jg5h
  • @agenticmail/openclaw (npm) Vendor— Affected before 0.5.71 Fixed in 0.5.71 Patch available GHSA-fq4x-789w-jg5h

Remediation

  • Fix · CNA @agenticmail/core (agenticmail) Fixed in 0.9.43
  • Fix · CNA @agenticmail/claudecode (agenticmail) Fixed in 0.2.39
  • Fix · CNA @agenticmail/codex (agenticmail) Fixed in 0.1.33
  • Fix · CNA @agenticmail/openclaw (agenticmail) Fixed in 0.5.71
  • Fix · GHSA-fq4x-789w-jg5h @agenticmail/core (npm) Fixed in 0.9.43 Advisory →
  • Fix · GHSA-fq4x-789w-jg5h @agenticmail/claudecode (npm) Fixed in 0.2.39 Advisory →
  • Fix · GHSA-fq4x-789w-jg5h @agenticmail/codex (npm) Fixed in 0.1.33 Advisory →
  • Fix · GHSA-fq4x-789w-jg5h @agenticmail/openclaw (npm) Fixed in 0.5.71 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-57495
  2. 2026-10-03 Alias added: GHSA-fq4x-789w-jg5h

References

Advisory 1

Other 2

  • TI-2026-37029 Missing Authentication for Critical Function in @agenticmail/mcp CVSS 4.0HIGH 8.7
  • TI-2026-41399 AgenticMail: Cross-agent task authorization bypass in AgenticMail API CVSS 4.0HIGH 7.1
  • TI-2026-34838 AgenticMail API/storage and outbound relay hardening CVSS 3.1HIGH 8.2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences