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Apache Cocoon CVE-2026-108089

| EUVDEUVD-2026-104914 HIGH
Exposure of Sensitive System Information to an Unauthorized Control Sphere (CWE-497)
2026-10-20 apache GHSA-fv7w-gq56-762w
7.5
CVSS 3.1 · Vendor: apache
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Attack ChainAIDerived

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

  1. Access
    Identify exposed Cocoon instance
  2. Exploit
    Request diagnostic/debug endpoints
  3. Execution
    Receive verbose logs and profile data
  4. Impact
    Harvest internal system information

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V14 - Data Protection System info exposure prevention
Exploitation Conditions

Requires a reachable Apache Cocoon instance whose diagnostic interfaces are network-accessible - specifically endpoints that trigger cache operations and expose verbose debug logging and profiling/profile information. No authentication or user interaction is needed (PR:N/UI:N), and the advisory states all versions are affected. The primary limiting factor is deployment: exploitation depends on the Cocoon instance (and its diagnostic/debug endpoints) being exposed to the attacker's network, and the vendor's recommended mitigation is to restrict access to trusted users, implying that network-level access control fully blocks the vector. Because the product is retired with no patch, the only remediations are access restriction or migration to an alternative.

Impact

The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N) describes a remotely reachable, low-complexity, unauthenticated flaw, which on paper warrants priority attention; the 7.5 base score is driven entirely by a high confidentiality impact (C:H, I:N, A:N) consistent with CWE-497 information exposure. However, the real-world signal set is weak and partly mitigating: no EPSS score, KEV status, or POC was provided in the input, so exploitation status is 'no public exploit identified at time of analysis'. No SSVC decision data (exploitation/automatable/technical impact) was supplied. The strongest mitigating factor is that this is an officially retired, unsupported product with no planned fix, meaning its production footprint and attacker interest are likely limited and targeted rather than widespread. Net assessment: a genuine unauthenticated information-disclosure exposure where present, but more of a hygiene/attack-surface issue than an urgent mass-exploitation priority - the lack of any exploitation telemetry (EPSS/KEV/POC all absent) argues against treating it as high-urgency unless a Cocoon instance is known to be internet-exposed.

Exploit ScenarioDerived

A remote, unauthenticated attacker who can reach an exposed Apache Cocoon instance over the network requests its diagnostic/management endpoints and receives verbose debug logging, profiling output, and cache-control functionality that should not be publicly accessible. This leaks internal system and application information useful for reconnaissance and follow-on attacks. No public exploit code was identified in the provided data, though the low attack complexity (AC:L) means no specialized conditions are needed.

Monitor Track and reassess. Why: Vendor states no customer action required.
No patch listed yet 0.5% exploitation probability (EPSS)

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AnalysisAIv2 – Oct 20, 2026

Unauthenticated information disclosure in Apache Cocoon can expose diagnostic interfaces, cache-triggering operations, verbose debug logging, and profile information to any user who can reach those endpoints; all versions are affected. The project is retired and no vendor fix is planned, so exposure is limited to deployments that leave diagnostic/debug endpoints accessible beyond trusted networks. No public exploit code or CISA KEV entry was identified at time of analysis.

Earlier versions of this analysis (1)
v1 Oct 20, 2026 - 11:17

Unauthenticated information disclosure in Apache Cocoon exposes diagnostic interfaces - cache-triggering operations, verbose debug logging, and profiler output - to any client that can reach the instance, leaking sensitive system and configuration detail (CWE-497). Every released version of Cocoon is affected, and because the project is retired the vendor has stated it will not ship a fix, so exposure depends entirely on whether a legacy instance remains deployed and network-reachable. Assessed severity is low-to-moderate (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N, confidentiality-only impact); no public exploit code has been identified at time of analysis and the CVE is not in CISA KEV, so real-world risk is driven by deployment reality rather than by active attack tooling.

RemediationAI

No vendor-released patch identified at time of analysis: Apache states the retired project will not receive a fix. Restrict network access to the Cocoon instance and specifically to its diagnostic, debug, profiling, and cache-triggering endpoints to trusted users via firewall rules, network ACLs, or an authenticated reverse proxy; where feasible, disable those endpoints and reduce verbose debug logging. Because the product is retired, plan migration to a maintained alternative. Trade-offs: blocking diagnostic endpoints can impair troubleshooting and monitoring, restricting access may break legitimate integrations, and reducing verbose logging can lower forensic detail. Vendor advisory: https://lists.apache.org/thread/fo6wh59zg4zmsnt3ohpc8pblyotn4zw7.

Affected VersionsENISA

Apache Cocoon 0 ≤*

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Technical ContextAI · show details

Apache Cocoon is a Java-based XML publishing and web framework. The issue is CWE-497, exposure of sensitive system information to an unauthorized control sphere: diagnostic interfaces are reachable without authentication and can trigger cache actions and reveal verbose debug logs and profile data. The CPE cpe:2.3:a:apache_software_foundation:apache_cocoon:*:*:*:*:*:*:*:* and EUVD entry EUVD-2026-104914 both indicate all Apache Cocoon versions are in scope. The Apache advisory at lists.apache.org/thread/fo6wh59zg4zmsnt3ohpc8pblyotn4zw7 notes the project is retired. The assessed vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N means remote, low-complexity, unauthenticated access with low confidentiality impact and no integrity or availability impact; practical risk depends on whether diagnostic/debug endpoints are network-exposed.

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Severity by source

Vendor (apache) PRIMARY 7.5 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
vuln.today AI 5.3 MEDIUM

Network-reachable, unauthenticated diagnostic exposure (AV:N/AC:L/PR:N/UI:N); impact is limited to disclosed diagnostic/debug/profile data with no integrity or availability effect, so C:L rather than NVD's C:H.

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

Primary rating from Vendor (apache).

CVSS VectorVendor: apache

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

Lifecycle Timeline

2
Analysis Updated
Oct 20, 2026 - 16:29 vuln.today
v2 - CVSS changed
CVSS changed
Oct 20, 2026 - 16:22 NVD
7.5 (HIGH)

DescriptionCVE.org

UNSUPPORTED WHEN ASSIGNED Exposure of sensitive system information to an unauthorized control sphere vulnerability in Apache Cocoon. An unauthenticated user could gain access to diagnostic interfaces, including triggering of cache, exposure of (verbose) debug logging and profile information.

This issue affects Apache Cocoon: all versions.

As this project is retired, we do not plan to release a version that fixes this issue. Users are recommended to find an alternative or restrict access to the instance to trusted users.

NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

Executive ViewAI

Why It Matters

Apache Cocoon, across all versions, can leak diagnostic interfaces, verbose debug logs, and profile information to anyone who can reach those endpoints, creating an internal information-disclosure risk for deployments that expose them beyond trusted networks. The project is retired and no vendor fix is planned, so leadership should treat this as a configuration and lifecycle risk rather than a patchable defect. No public exploit was identified at time of analysis, making immediate exposure reduction the priority.

Business Impact: Medium
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations: block external access to diagnostic, debug, cache-triggering, and profile endpoints at the network edge; disable verbose debug logging and diagnostic/profile interfaces where possible; restrict any remaining access to trusted management networks via allowlisting; deploy reverse-proxy or WAF deny rules for those endpoint patterns; monitor and review access logs; prioritize migration off the retired Apache Cocoon platform.

Threat Intelligence Overview

EPSS Score
0.5%
Top 59% exploitable
Prevalence
Low
retired, unsupported Java web framework with minimal remaining production footprint
Data Quality
6 sources
Confidence: High

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 HIGH
CISA KEV No
Public POC No
EPSS 0.5%
Patch available No
Active threat No
Deciding rule
Vendor states no customer action required
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
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
Yes
Human Impact
Medium
Technical Impact
Partial

Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

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