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Drupal Webform CVE-2026-96370

| EUVDEUVD-2026-107837 MEDIUM
Incorrect Authorization (CWE-863)
2026-10-22 drupal GHSA-43v3-h2r6-vmmr
5.4
CVSS 3.1 · Vendor: drupal
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Authenticate with low-privileged account
  2. Exploit
    Abuse Webform authorization flaw
  3. Execution
    Server issues attacker-directed request
  4. Impact
    Access internal or restricted resources

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization logic validation
MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Requires a valid authenticated account with at least low privileges on the target Drupal site (PR:L); it is not exploitable by fully anonymous visitors. The incorrect authorization check (CWE-863) then lets that user cause the Webform module to perform server-side requests. The specific Webform feature, submission path, or configuration that must be reachable is not described in the available sources, so it cannot be stated which non-default settings, if any, narrow exposure. Limiting factors: authentication is required, but no user interaction (UI:N) and only low attack complexity (AC:L) are needed once a foothold account exists.

Impact

This is a moderate, not emergency, priority. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N, base 5.4) describes a network-reachable, low-complexity flaw that requires an authenticated low-privileged account (PR:L) and yields only low confidentiality and low integrity impact with no availability impact - consistent with an SSRF that lets an attacker coerce the server into making requests but without full system compromise. The exploitation signals reinforce a measured response: EPSS is low at 0.20% (9th percentile), there is no CISA KEV listing (not actively exploited), and no public exploit identified at time of analysis. The vuln.today decision label is 'this_month', aligning with the low-to-moderate signals rather than act_now/emergency. The main thing elevating real-world concern is the product footprint and the PR:L (rather than PR:N) requirement, which limits exploitation to users who can already authenticate. No SSVC automatable/technical-impact fields were supplied, so an automatability judgement cannot be made from the input. Net: a genuine issue warranting timely patching within the normal cycle, not a drop-everything flaw.

Exploit ScenarioDerived

An attacker holding a low-privileged authenticated account on a Drupal site running a vulnerable Webform version abuses the incorrect authorization check to make the server issue attacker-directed HTTP requests (SSRF), potentially reaching internal services, cloud metadata endpoints, or otherwise unreachable hosts. Because AC:L and no user interaction are required, exploitation is reliable once the attacker is authenticated. No public exploit identified at time of analysis; only the vendor advisory is referenced.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 22, 2026

Server-side request forgery in the Drupal Webform contributed module (versions 0.0.0 through 6.2.12 and 6.3.0 through 6.3.1) lets a user who holds a low-privileged authenticated account on the Drupal site cause the module to issue requests from the server, with limited confidentiality and integrity impact. Exploitation requires a valid account (CVSS PR:L) but no user interaction and no special complexity, so the practical barrier is simply having a foothold login on the site. The vendor has released a patch per the Drupal advisory, EPSS is low at roughly 0.20% (9th percentile), and no public exploit has been identified at time of analysis; the priority is a routine this-month remediation rather than an emergency response.

RemediationAI

Patch available per vendor advisory: upgrade the Webform module past the affected ranges, i.e. to a release later than 6.2.12 on the 6.2.x branch or later than 6.3.1 on the 6.3.x branch, as listed in Drupal security advisory SA-CONTRIB-2026-164 (https://www.drupal.org/sa-contrib-2026-164); that advisory is the authoritative source for the exact fixed release identifiers and should be consulted before updating. Because the vendor identifies the patched module release as the fix, treat the upgrade itself as the complete remediation rather than relying on configuration changes. No configuration workaround is documented in the available sources; the one exposure-reduction step that follows directly from the assessed prerequisites is to review and trim the population of low-privileged authenticated accounts on Drupal sites running Webform, since every such account satisfies the PR:L condition, though this only narrows the attack surface and does not remove the flaw. Given a this_month priority, EPSS of about 0.20% and no public exploit identified at time of analysis, the update can be scheduled in the normal maintenance window.

Affected VersionsENISA

Webform 0.0.0 <6.2.12
Webform 6.3.0 <6.3.1

Affected Packages

composer drupal/webform fix: 6.2.12, 6.3.1
euvd webform fix: 6.2.12, 6.3.1

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in composer, euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The flaw is classified as CWE-863 (Incorrect Authorization) in Drupal's Webform contrib module, a widely deployed form-building component that handles submissions, remote handlers and server-side processing of form configuration. Because an authorization check is applied incorrectly, a low-privileged authenticated user can reach functionality that causes the Drupal host to initiate outbound network requests on their behalf, which is the classic SSRF pattern: the server's network position and trust relationships, rather than the attacker's, determine what can be reached. The exact Webform feature, submission path or configuration required to trigger the issue is not described in the available sources, so it cannot be stated here which non-default settings, if any, narrow exposure. The CPE entry (cpe:2.3:a:drupal:webform:*:*:*:*:*:*:*:*) covers the module across all platform versions, and the affected ranges 0.0.0 to 6.2.12 and 6.3.0 to 6.3.1 confirm both the 6.2.x and 6.3.x lines are impacted.

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Severity by source

Vendor (drupal) PRIMARY 5.4 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
vuln.today AI 5.4 MEDIUM

Network-reachable SSRF usable by any low-privileged authenticated user (PR:L, AC:L), yielding limited internal read/request capability (C:L/I:L) and no availability impact.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (drupal).

CVSS VectorVendor: drupal

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

2
Patch available
Oct 22, 2026 - 03:01 EUVD
CVE Published
Oct 22, 2026 - 01:21 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

Incorrect Authorization vulnerability in Drupal Webform allows Server Side Request Forgery. This issue affects Webform versions: from 0.0.0 to 6.2.12, from 6.3.0 to 6.3.1.

Threat Intelligence Overview

EPSS Score
0.2%
Top 91% exploitable
Prevalence
Medium
very popular Drupal form module, but Drupal is a minority CMS
Data Quality
4 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

27
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +27
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Server-Side Request Forgery exploits applications that fetch remote resources based on user-supplied URLs.

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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