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CVE-2026-45013 apostrophecms CVE debrief

ApostropheCMS, an open-source Node.js content management system, has a password reset flow vulnerability in versions up to and including 4.29.0. The vulnerability allows an unauthenticated attacker who knows a victim's email address to send a crafted reset request. This causes the application to email the victim a reset link pointing to the attacker's domain. When the victim clicks the link, the valid reset token is delivered to the attacker, enabling full account takeover. The vulnerability is caused by the reset URL being constructed using `req.hostname`, which is derived directly from the attacker-controlled HTTP `Host` header when `apos.baseUrl` is not explicitly configured.

Vendor
apostrophecms
Product
apostrophe
CVSS
HIGH 8.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-12
Original CVE updated
2026-06-15
Advisory published
2026-06-12
Advisory updated
2026-06-15

Who should care

Users of ApostropheCMS, especially those who have not upgraded to a patched version, should be aware of this vulnerability. An unauthenticated attacker can exploit this vulnerability to gain control of a victim's account.

Technical summary

The vulnerability has a CVSS score of 8.1 and is classified as HIGH severity. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N. The weaknesses associated with this vulnerability are CWE-20 and CWE-640.

Defensive priority

HIGH

Recommended defensive actions

  • Upgrade to a patched version of ApostropheCMS as soon as available.
  • Configure `apos.baseUrl` to prevent the use of `req.hostname`.
  • Be cautious when clicking on password reset links, especially if they are unexpected.

Evidence notes

The CVE record and NVD detail can be found at resourceLinkAnnotations: cve-org and nvd.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-45013 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-45013

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-45013 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45013

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.