Is this vulnerability remotely exploitable over the internet?

Yes. An attacker only needs network access to the IRRD HTTP(S) interface to craft malicious password reset or account creation requests and then convince a user to open the resulting email link.

Does exploitation require authentication or special privileges?

No prior authentication is required to trigger the vulnerable flows. The attacker can initiate password reset or account creation events for target email addresses and control the Host header. Two-factor authentication, if enabled and required for an account, can limit the final impact by preventing login even after a password reset.

What is the safest general fix pattern for this issue?

Configure a canonical application base URL and use it for all externally visible links, ignoring or strictly validating the Host header. Combine this with robust, single-use, time-limited tokens for password reset and account activation, and ensure tokens are only processed by the legitimate application domain.

Severity:

HIGH RISK

(8.1)

Host Header Poisoning & Insecure Password Reset (CWE-601/CWE-640) in IRRD v4

CVE-2026-28681

Published:

Mar 5, 2026

Status:

Awaiting Analysis

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI Handler setAccessDeviceCfg

Remote Code Execution on the Router

April 12, 2026

CWE-77;CWE-78

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI setLedCfg Handler

Remote Code Execution on the Router

April 12, 2026

Vulnerability Type

Category:

Host Header Injection / Insecure Account Recovery

CWE:

CWE-601;CWE-640

Impact:

Account Takeover via Manipulated Password Reset and Account Creation Links

Severity:

HIGH RISK

(8.1)

CVSS Version:

3.1

Vulnerability Type

Category:

Host Header Injection / Insecure Account Recovery

CWE:

CWE-601;CWE-640

Impact:

Account Takeover via Manipulated Password Reset and Account Creation Links

Severity:

HIGH RISK

(8.1)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

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355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Host Header Poisoning & Insecure Password Reset (CWE-601/CWE-640) in IRRD v4

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI Handler setAccessDeviceCfg

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI setLedCfg Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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