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PatchSiren cyber security CVE debrief

CVE-2026-78533 AncoraThemes CVE debrief

Unauthenticated PHP Object Injection vulnerability in Qwery theme versions <= 3.6.1. CVE-2026-78533 has a CVSS score of 9.8 and is considered CRITICAL. Defenders should assess exposure and prioritize remediation due to potential significant impact. The vulnerability allows attackers to inject malicious PHP objects, potentially leading to arbitrary code execution. Verification of exposure and remediation is necessary. The CVE-

Vendor
AncoraThemes
Product
Qwery
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-10
Original CVE updated
2026-10-10
Advisory published
2026-10-10
Advisory updated
2026-10-10

Who should care

Defenders responsible for systems using the Qwery theme should assess exposure and prioritize remediation due to the high CVSS score and potential for significant impact.

Why it matters

CVE-2026-78533 is a critical vulnerability in the Qwery theme that requires immediate attention from defenders. The vulnerability has a high CVSS score of 9.8 and could have significant impact if exploited.

  • Potential for significant impact due to high CVSS score
  • Verification of exposure and remediation is necessary

Technical summary

CVE-2026-78533 is an Unauthenticated PHP Object Injection vulnerability in Qwery theme versions <= 3.6.1. The vulnerability has a CVSS score of 9.8 and is considered CRITICAL.

Defensive priority

Defenders should prioritize verification of exposure and remediation due to the high CVSS score and potential for significant impact.

Recommended defensive actions

  • Verify exposure by checking installed Qwery theme versions
  • Assess potential impact on systems using the Qwery theme
  • Prioritize remediation or mitigation efforts for affected systems

Evidence notes

The vulnerability was reported by Patchstack and is documented in the NVD. However, details on affected versions and remediation are limited.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-78533 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-78533

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

  • CVE-2026-78533 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-78533

    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.