Unrated

Cross-site scripting vulnerability in Drupal CMS

IdentifiersCVE-2026-55805

CVE-2026-55805 is one of multiple vulnerabilities addressed in Drupal CMS security updates released in July 2026. Available information indicates that successful exploitation allows remote code injection in the browser context through cross-site scripting and may affect the confidentiality of data. Specific details about the vulnerable component, function, or attack vector are not currently available.

For your environment

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation may allow an attacker to inject malicious script into content processed by Drupal CMS and execute it in a victim user's browser context. This can lead to compromise of data confidentiality, including unauthorized access to session-associated information or other sensitive data exposed to the affected web application context.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, prioritize restricting exposure of untrusted content and administrative interfaces, review application configurations that permit user-supplied markup or script-adjacent input, and apply compensating controls such as strong output encoding, content security policy, and heightened monitoring for suspicious client-side injection behavior. These measures are temporary and do not replace upgrading to a fixed version.

Remediation

Patch, then assume compromise.

Upgrade Drupal CMS to a fixed release. Reported fixed versions include 11.4.4 or later for the 11.4.x branch, 11.3.14 or later for the 11.x branch, and 10.6.13 or later for affected earlier 10.x releases. Apply the vendor's July 2026 security updates across all affected deployments.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

DrupalDrupalapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

2 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.

2 SOURCESView more in app

No news coverage yet. Advisories and community discussion only.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity1

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2026-55805

NVD

nvd.nist.gov/vuln/detail/CVE-2026-55805

Cross-site scripting vulnerability in Drupal CMS

IdentifiersCVE-2026-55805