● Medium · CVSS 6.9

How to Fix CVE-2026-1556: Information Disclosure in Drupal File (Field) Paths

Q: Is CVE-2026-1556 being exploited in the wild?

Public exploitation has not been confirmed by CISA at the time of writing. Treat the patch as time-sensitive anyway; reports often lag actual abuse.

Q: Will a WAF or IDS rule fully mitigate CVE-2026-1556?

No. Network-layer filters can reduce noise and slow opportunistic scanners, but they will not stop a determined attacker. The vendor patch is the only durable fix.

Q: How long should I plan for the upgrade?

Typical vendor-documented upgrade windows for Drupal File (Field) Paths run from a few minutes to under an hour depending on cluster size. Test in a staging environment first and follow the vendor's documented HA upgrade order.

Other vulnerabilities in the same area that are worth patching alongside this one:

How to Fix CVE-2026-3530: Critical Vulnerability in OpenID Connect / OAuth client — Critical Vulnerability in OpenID Connect / OAuth client
How to Fix CVE-2026-3531: Authentication Bypass in OpenID Connect / OAuth client — Authentication Bypass in OpenID Connect / OAuth client
How to Fix CVE-2026-3527: Authentication Bypass in AJAX Dashboard , Authentication Bypass in AJAX Dashboard
How to Fix CVE-2026-0749: Critical Vulnerability in Drupal , Critical Vulnerability in Drupal
How to Fix CVE-2026-8492: Critical Vulnerability in Translate Drupal with GTranslate , Critical Vulnerability in Translate Drupal with GTranslate

*By Sai Kiran Pandrala*

⚡ At a glance


Severity	CVSS 6.9 - Medium
Actively exploited?	Not currently listed in CISA KEV
Affected	7.x-1.0 < 7.x-1.3
Fixed in	See vendor advisory
Type (CWE)	CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

What is CVE-2026-1556?

CVE-2026-1556 is an information disclosure flaw in Drupal File (Field) Paths. The product returns sensitive data to a caller who should not have access, including credentials, session tokens, or configuration. Disclosure often feeds a follow-up attack chain. Vendor description: Information disclosure in the file URI processing of File (Field) Paths in Drupal File (Field) Paths 7.x prior to 7.1.3 on Drupal 7.x allows authenticated users to disclose other users’ private files via filename‑collision uploads. This can cause hook_node_insert() consumers (for example, email attachment modules) to receive the wrong file URI, bypassing normal access controls on private files.

Why this CVE matters

Information disclosure flaws are dangerous because they make the next attack easier. Sensitive configuration, session material, or credentials leaked from one endpoint frequently power the follow-on attack that actually takes over the system.

For deployments of Drupal File (Field) Paths that have been exposed to the public internet during the disclosure window, the operating assumption should be that scanning has already happened. Even where exploitation has not been publicly observed, scanning for the vulnerable fingerprint is cheap and routine. Patching closes the door; log review and credential rotation close out the rest of the response.

Am I affected?

You are affected if your installation matches any of these version ranges:

Drupal File (Field) Paths: 7.x-1.0 < 7.x-1.3

Check your installed version against the list above. If you cannot determine the version, treat the system as affected and follow the upgrade path below.

Open Drupal File (Field) Paths's About dialog or run the vendor-documented version-check command. Compare the result against the affected ranges in the advisory.

How to fix CVE-2026-1556

The fix is to upgrade Drupal File (Field) Paths to version 7.x-1.3 or later.

Affected versions confirmed in the CVE record:

Drupal File (Field) Paths < 7.x-1.3

Update the PHP package


<!-- enrich_agent_2:v1 -->
# Composer (most projects).
composer require Drupal File (Field) Paths:^7.x-1.3
composer update Drupal File (Field) Paths
composer show Drupal File (Field) Paths

Verify the fix worked


<!-- enrich_agent_2:v1 -->
# 1. Confirm the running version matches the fixed-in version from the advisory.
#    Cross-check against the vendor advisory: https://www.herodevs.com/vulnerability-directory/cve-2026-1556

# 2. Re-scan with your vulnerability scanner. The scanner should no longer flag
#    this CVE on the patched host.
# Example with Nmap NSE:
nmap -sV --script vuln <target-host>

# 3. Inspect the service / kernel logs for crash-loops or rollback events in
#    the first hour after the upgrade.
journalctl -u <service-name> --since "1 hour ago"
dmesg --since "1 hour ago"

If you cannot patch immediately

No official workaround exists beyond restricting network exposure to the affected component. Apply the vendor patch as the primary remediation.

How to verify the fix worked

After applying the patch, verify the running version in the product's admin UI or via the vendor-documented CLI command.
Confirm the patched build matches the version listed in the vendor advisory.
Run an authenticated vulnerability scan with a current signature set and confirm the scanner no longer flags CVE-2026-1556.
Review logs for the entire pre-patch window for indicators of compromise listed in the vendor or CISA advisory.
Confirm any network-layer mitigations that were applied as a stopgap have been reverted (or left in place intentionally) once the patch is verified.

If your installation was internet-reachable during the disclosure window, treat log review as part of the remediation rather than an optional follow-up. Look for unusually long URI paths containing traversal sequences, unexpectedly large responses from the affected endpoint, and outbound requests from the application to internal addresses or cloud-metadata endpoints. Treat any sensitive file the bug could disclose as exposed.

Frequently asked questions

Is CVE-2026-1556 being exploited in the wild?