PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-40761 Edge-Themes CVE debrief

CVE-2026-40761 is a high-severity vulnerability in the Valeska theme, affecting versions up to 1.2.2. This vulnerability allows unauthenticated attackers to inject PHP objects, potentially leading to arbitrary code execution. The CVSS score for this vulnerability is 8.1, indicating a high level of severity. The vulnerability was published on June 17, 2026, and last modified on the same day. Users of the Valeska theme should take immediate action to mitigate this vulnerability.

Vendor
Edge-Themes
Product
Valeska
CVSS
HIGH 8.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-17
Original CVE updated
2026-06-17
Advisory published
2026-06-17
Advisory updated
2026-06-17

Who should care

Administrators and users of the Valeska theme, version 1.2.2 or earlier, should be aware of this vulnerability and take necessary precautions to prevent exploitation. This includes updating to a patched version of the theme, if available, and implementing additional security measures to detect and prevent PHP object injection attacks.

Technical summary

CVE-2026-40761 is an unauthenticated PHP object injection vulnerability in the Valeska theme, affecting versions up to 1.2.2. The vulnerability has a CVSS score of 8.1 and is classified as CWE-502. The attack vector is network-based, and the vulnerability requires no user interaction. Successful exploitation could lead to arbitrary code execution.

Defensive priority

High

Recommended defensive actions

  • Update the Valeska theme to a patched version, if available.
  • Implement a web application firewall (WAF) to detect and prevent PHP object injection attacks.
  • Monitor the system for suspicious activity and implement logging and auditing to detect potential exploitation.
  • Restrict access to the Valeska theme's administrative interface to trusted users only.
  • Use secure coding practices to prevent PHP object injection vulnerabilities in custom code.
  • Regularly review and update the Valeska theme to ensure it is up-to-date with the latest security patches.

Evidence notes

The information provided is based on data from the National Vulnerability Database (NVD) and Patchstack. The CVE record was published on June 17, 2026, and last modified on the same day. The vulnerability is classified as CWE-502, and the CVSS vector is CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-40761 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-40761

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

  • CVE-2026-40761 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-40761

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

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.