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CWE-644Weakness · CWE-644

CVE-2025-70948

CRITICAL · 9.3 CVSS v3.1 Published 2026-03-05
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A host header injection vulnerability in the mailer component of @perfood/couch-auth v0.26.0 allows attackers to obtain reset tokens and execute an account takeover via spoofing the HTTP Host header.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Host header injection vulnerability in the mailer component of @perfood/couch-auth v0.26.0 allows attackers to spoof the HTTP Host header when requesting password resets, causing reset tokens to be sent to attacker-controlled URLs, enabling account takeover.

MitigationFix the mailer to use a fixed, configured base URL for password reset links rather than trusting the HTTP Host header, or implement strict Host header validation and allowlisting.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check installed version of @perfood/couch-auth
    Run 'npm list @perfood/couch-auth' or check your package.json to identify the exact version installed
    Affected if Version is 0.26.0 or any earlier version where the mailer uses the Host header for reset URLs
  2. Verify mailer component is configured
    Inspect your application configuration files for mailer settings, specifically look for password reset email configuration
    Affected if Mailer is enabled and configured to send password reset emails
  3. Inspect password reset URL construction logic
    Examine the source code of the mailer component, looking for where reset token URLs are built - search for code that uses the Host header or request.hostname in URL construction
    Affected if The code uses the HTTP Host header to construct password reset URLs instead of a hardcoded trusted domain
  4. Check environment configuration for trusted domain settings
    Look for environment variables or config files that specify a trusted domain for password reset URLs; verify if one exists and is being used
    Affected if No trusted domain is configured, or the configuration is being ignored in favor of the client-supplied Host header

You are affected if @perfood/couch-auth version 0.26.0 or earlier is installed AND the mailer component is configured to send password reset emails using the client-supplied Host header to construct reset URLs.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Fix the mailer to use a fixed, configured base URL for password reset links rather than trusting the HTTP Host header, or implement strict Host header validation and allowlisting.

Have this fixed Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing4.0 h
  • Review / QA2.0 h
15.0 hours of engineering $2,640
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-70948 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data