# CVE-2026-57495 — agenticmail @agenticmail/core

> As of 2026-07-20, CVE-2026-57495 is a High-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in agenticmail @agenticmail/core, CVSS v4.0 8.2, EPSS 0.2% (20.2th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-57495 as of 2026-07-20; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-07-20

## What is CVE-2026-57495?

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.

The record classifies CVE-2026-57495 under weakness class [CWE-306](https://intel.threadlinqs.com/cwe/CWE-306). 4 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 77 days ago.

## Severity and exploitation probability

- **CVSS v4.0 base score:** 8.2 — High (derived from score) (`CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N`)
- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 20.2% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.9/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-07-20

## Is CVE-2026-57495 being exploited?

It currently carries a trending score of 35 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **agenticmail**: @agenticmail/core, @agenticmail/claudecode, @agenticmail/codex, @agenticmail/openclaw

Affected software packages:

- `npm:@agenticmail/core` — patched in 0.9.43
- `npm:@agenticmail/claudecode` — patched in 0.2.39
- `npm:@agenticmail/codex` — patched in 0.1.33
- `npm:@agenticmail/openclaw` — patched in 0.5.71

## How to fix CVE-2026-57495

Fixed versions are recorded for 4 packages: npm:@agenticmail/core 0.9.43, npm:@agenticmail/claudecode 0.2.39, npm:@agenticmail/codex 0.1.33, npm:@agenticmail/openclaw 0.5.71. No vendor patch reference has been recorded for CVE-2026-57495 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-57495

No threat campaign in the Threadlinqs corpus currently references CVE-2026-57495, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-07-21. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com](https://github.com/agenticmail/agenticmail/security/advisories/GHSA-fq4x-789w-jg5h)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-57495
Full detection coverage and IOCs for threats exploiting CVE-2026-57495 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp