How should we interpret CVSS severity scores?

CVSS estimates technical severity, but it does not automatically equal business risk. Prioritize using context like internet exposure, asset criticality, known exploitation, and whether compensating controls exist. A Medium CVSS on an exposed production system can be more urgent than a Critical on an isolated non-production host.

Vulnerability Database

Q: What is a Vulnerability (CVE) and why does it matter?

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

Q: What's the difference between a vulnerability, an exploit, and a zero-day?

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. Risk increases sharply when exploitation becomes reliable or widespread.

Q: Why do vulnerabilities keep reappearing in our environment?

Recurring findings usually come from incomplete asset discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host.

Q: How do we prioritize remediation without burning out the team?

Use a repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress so remediation is steady, not reactive.

Q: How can SynScan help reduce vulnerability risk over time?

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.

351,760

Total vulnerabilities in the database

AgenticMail: Cross-agent task authorization bypass in AgenticMail API — @agenticmail / api

Authorization Bypass Through User-Controlled Key

Summary

A low-privileged authenticated AgenticMail agent can enumerate another agent's pending/claimed tasks by supplying the target agent name to GET /api/agenticmail/tasks/pending?assignee=<name>. The returned task objects include the task IDs and payloads. The same task IDs can then be used with the capability-style task mutation endpoints (/tasks/:id/claim, /tasks/:id/result, /tasks/:id/complete, /tasks/:id/fail) to claim, complete, or fail tasks assigned to a different agent.

Because ordinary authenticated agents can discover agent names through GET /api/agenticmail/accounts/directory, the task ID effectively stops being a secret capability. This turns the intended capability model into a cross-agent authorization bypass.

Affected component

Package: @agenticmail/api Observed version: 0.9.62 Repository: agenticmail/agenticmail

Relevant code paths:

packages/api/src/app.ts: createAuthMiddleware(...) is mounted before createAccountRoutes(...) and createTaskRoutes(...), so these routes are reachable by any valid bearer token.
packages/api/src/routes/accounts.ts: GET /accounts/directory is available to any authenticated user and returns agent names.
packages/api/src/routes/tasks.ts: GET /tasks/pending?assignee=name resolves arbitrary agent names and returns that agent's pending/claimed tasks.
packages/api/src/routes/tasks.ts: /tasks/:id/claim, /tasks/:id/result, /tasks/:id/complete, /tasks/:id/fail, and /tasks/:id do not check whether the authenticated caller is the task assignee, assigner, or otherwise authorized for the task.

Impact

An attacker only needs a valid agent API key. They can:

List agent names using /accounts/directory.
Query another agent's task queue using /tasks/pending?assignee=<victimName>.
Read sensitive task payloads intended for the victim agent.
Use the disclosed task ID to complete/fail/claim the victim's task or submit attacker-controlled results.

Local reproduction

I reproduced this locally with a focused Vitest test mounted directly on createTaskRoutes. The test creates two agents, Alice and Bob, and one pending task assigned to Bob. Alice authenticates with her own agent key and performs the following sequence:

GET /api/agenticmail/tasks/pending?assignee=Bob with Authorization: Bearer ak_alice.
The response is HTTP 200 and includes Bob's task ID and payload: task-for-bob, { "task": "secret task intended for Bob" }.
Alice then sends POST /api/agenticmail/tasks/task-for-bob/complete with her own bearer token and an attacker-controlled result.
The task status becomes completed and the stored result is controlled by Alice.

The local verification command was:

npm run test --workspace=@agenticmail/api -- task-routes-authz.test.ts

Result:

PASS src/__tests__/task-routes-authz.test.ts (1 test)

Expected behavior

Task listing and task mutation endpoints should enforce an authorization relationship between the authenticated caller and the task. For example:

GET /tasks/pending?assignee=<name> should either be restricted to the current agent, master/admin callers, or an explicit delegated relationship.
/tasks/:id/claim, /tasks/:id/result, /tasks/:id/complete, /tasks/:id/fail, and /tasks/:id should verify that the caller is the assignee, assigner, master/admin, or otherwise explicitly authorized.
If capability-based task IDs are retained, the API should not expose those IDs to unrelated agents through the assignee-name listing path.

Credit

Please credit the finder as: Yaohui Wang

Published: Jun 18, 2026
Updated: Jun 19, 2026
GHSA: GHSA-hjwc-26pj-v3pm
Severity: High
Exploit:
CISA KEV:

No technical information available.

CWEs:

OWASP TOP 10:

A5 - Broken Access Control

Affected Software
References

Software	From	Fixed in
@agenticmail / api	-	0.9.64

https://github.com/agenticmail/agenticmail/security/advisories/GHSA-hjwc-26pj-v3pm

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Frequently Asked Questions

What is a Vulnerability (CVE) and why does it matter?

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.