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Drupal Webform CVE-2026-96373

| EUVDEUVD-2026-107833 LOW
Incorrect Authorization (CWE-863)
2026-10-22 drupal GHSA-mjqh-5834-rq4f
3.3
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 to Drupal site with privileged account
  2. Exploit
    Browse directly to unauthorized Webform resource
  3. Execution
    Bypass incorrect authorization check
  4. Impact
    View or alter restricted form data

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

The description names no specific Webform feature, protocol, or configuration setting as a prerequisite, so the exact precondition is not stated in the available sources. Per the vendor CVSS vector, exploitation requires high privileges (PR:H) and high attack complexity (AC:H) with no user interaction (UI:N), meaning an authenticated, already-privileged Drupal account rather than an anonymous visitor. Exploitation is limited to Webform versions 0.0.0-6.2.12 and 6.3.0-6.3.1; sites on 6.2.12 or 6.3.1+ are not affected. The high privilege and complexity requirements, plus the limited C:L/I:L impact, materially constrain realistic risk below the network-reachable vector alone.

Impact

All signals point to low real-world priority. The vendor CVSS is 3.3 (Low) driven by AV:N but tempered by AC:H, PR:H, and only partial confidentiality/integrity impact (C:L/I:L/A:N) with no scope change - i.e. a high-privileged, authenticated user abusing an authorization gap rather than a remote-unauthenticated break. EPSS agrees: 0.18% (7th percentile), indicating very low likelihood of near-term exploitation. The vuln.today decision label is 'monitor', not act_now/emergency. This is NOT in CISA KEV (no confirmed active exploitation), and there is no public exploit identified at time of analysis - the only linked Drupal reference is the vendor security advisory, not working exploit code. The one tension to flag: the input tag 'Authentication Bypass' is imprecise - the CWE (CWE-863 Incorrect Authorization) and the description ('Forceful Browsing') describe an authorization/access-control gap, not an authentication bypass; this does not change severity but matters for categorization. Net: a genuine low-severity authorization flaw, not a high-CVSS-but-low-risk inflation case, and not an urgent one.

Exploit ScenarioDerived

An authenticated Drupal user with the privilege level the vendor vector assumes (PR:H) navigates directly to a Webform resource or endpoint they should not be able to reach (forceful browsing), and the incorrect authorization check fails to stop them, exposing or letting them alter limited form data (C:L/I:L). No public exploit code is identified; the precise request needed to trigger the gap is not described in the available sources.

Monitor Track and reassess. Why: LOW severity (CVSS 0.1-3.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 22, 2026

Incorrect authorization in Drupal Webform allows forceful browsing; all signals point to low real-world priority. Affected releases are the supplied 0.0.0-6.2.12 and 6.3.0-6.3.1 ranges, with the independent assessment identifying 6.2.12 and 6.3.1+ as not affected, and successful exploitation is limited to low confidentiality and integrity impact. No public exploit was identified at time of analysis, EPSS is 0.18% (7th percentile), and the vendor patch is available; the supplied vendor vector requires high privileges and high attack complexity, while the independent reassessment lowers those requirements to low privileges and low complexity.

RemediationAI

Vendor-released patch: update to Webform 6.2.12 or 6.3.1 (or later), which the independent assessment identifies as not affected; reconcile the supplied ranges with SA-CONTRIB-2026-168 at https://www.drupal.org/sa-contrib-2026-168 before upgrading, because the source data also lists 0.0.0-6.2.12 and 6.3.0-6.3.1 as affected. No workaround is stated in the available sources. Given the 'monitor' decision label and EPSS 0.18%, apply the update through normal Drupal maintenance rather than emergency change.

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

Drupal Webform is a contributed Drupal module for building forms and managing submissions. The root cause is CWE-863 Incorrect Authorization, exposed as forceful browsing in which a user reaches a route or resource that should be gated by an authorization check; the specific Webform feature or configuration that must be present is not described in the available sources. The affected CPE is cpe:2.3:a:drupal:webform:*:*:*:*:*:*:*:*, with supplied affected branches 0.0.0-6.2.12 and 6.3.0-6.3.1, although the independent assessment states that 6.2.12 and 6.3.1+ are not affected. The vendor CVSS vector is AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N, while the independent reassessment is AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N, so impact is confined to low confidentiality and integrity with no availability effect.

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Severity by source

Vendor (drupal) PRIMARY 3.3 LOW
AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N
vuln.today AI 5.4 MEDIUM

Forceful browsing is typically a low-complexity authenticated access-control gap, so I assess AC:L/PR:L rather than the vendor's AC:H/PR:H; impact stays limited (C:L/I:L, A:N).

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
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

3
CVSS changed
Oct 22, 2026 - 15:22 NVD
3.3 (LOW)
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 Forceful Browsing. 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 93% exploitable
Prevalence
Medium
Webform is a very popular Drupal contrib module, but Drupal itself is a mid-footprint CMS
Data Quality
5 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 LOW
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
LOW severity (CVSS 0.1-3.9)
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
Defer
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Low
Technical Impact
Partial

Priority Score

16
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +16
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

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

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