Common Weakness Enumeration
CWE-502
AllowedDeserialization of Untrusted Data
Abstraction: Base · Status: Draft
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
5789 vulnerabilities reference this CWE, most recent first.
CVE-2026-95806 (GCVE-0-2026-95806)
Vulnerability from cvelistv5 – Published: 2026-09-22 15:09 – Updated: 2026-09-22 15:54
VLAI
EPSS
VEX
Title
MISP: PHP phar stream wrapper enables deserialization and code execution via caller-influenced filesystem paths
Summary
MISP ships with PHP's phar stream wrapper registered in both its web entry point and its console entry point.
The phar stream wrapper causes PHP to treat a phar archive as a directory, which has two security consequences:
- any filesystem operation on a caller-influenced path that resolves to a phar archive triggers an implicit unserialize() call, creating a deserialization sink;
- a relocated application root can reach executable code inside an uploaded phar file, enabling arbitrary code execution as the web user.
No component of MISP, the vendored CakePHP framework, or any runtime-loaded library reads or constructs phar archives. The wrapper therefore serves no legitimate purpose in the MISP runtime and exists solely as an available primitive for an attacker who can influence a filesystem path argument.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 15:53 UTC
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/MISP/MISP/commit/08fa755b6 | patch |
GCVE extensions
AI-generated
Human-reviewed
Confidence: medium
Model
qwen3.8:27b
advisory
bcp-05-x-01bcp-05-x-02
Draft vulnerability metadata was generated from a git-format patch using an Ollama-hosted language model. Human validation is required before publication.
ai-computer-assisted:llm-generatedai-computer-assisted:classification
| Model | Source | Identifier |
|---|---|---|
| qwen3.8:27b | ollama | qwen3.8:27b |
- Generator
-
patch2vuln.pyon 2026-09-22 15:01 - Model
qwen3.8:27b- Input
-
https://github.com/MISP/MISP/commit/08fa755b6.patch
f4fc3223e642… - Confidence
- medium
| Commit | Subject | Patch SHA-256 |
|---|---|---|
08fa755b6363
|
chg: [internal] Unregister the phar stream wrapper in the | f4fc3223e642… |
Fix summary
The phar stream wrapper is unregistered via stream_wrapper_unregister('phar') at the top of both the web and console entry points, before any framework bootstrap or application code executes. Because no MISP component, CakePHP, or runtime library requires the phar wrapper, removing it eliminates the implicit unserialize() sink and the directory-like phar archive behavior without functional impact. This closes the deserialization and code-execution primitive application-wide, independent of whether individual callers validate their path arguments.
Patch summary
Two files are modified. In app/Console/cake.php and app/webroot/index.php, a 14-line block is inserted immediately after the file header comment and before any existing logic. The block checks whether 'phar' is present in stream_get_wrappers() and, if so, calls stream_wrapper_unregister('phar'). A docblock comment explains the security rationale: the wrapper turns filesystem calls on caller-influenced paths into unserialize() sinks and allows a relocated application root to reach code inside an uploaded file. No other code is changed; the total diff is 28 insertions across the two files.
CVSS rationale
AV:N: The vulnerability is reachable through the web entry point (app/webroot/index.php), making it network-accessible. AC:H: Exploitation requires crafting a valid phar archive with a malicious serialized payload and identifying a code path where a caller-influenced filesystem argument resolves to that archive; the commit describes this as an 'argument-injection exploit,' implying non-trivial path manipulation. AT:N: No specific attack-target conditions are indicated. PR:L: MISP is a threat-intelligence platform that typically requires authenticated access; the commit references 'the web user' context, suggesting the attacker operates within the application's privilege boundary. UI:N: No user interaction is required. VC/VI/VA:H: Successful exploitation results in arbitrary code execution as the web user, compromising confidentiality, integrity, and availability of the MISP instance. SC/SI/SA:N: No evidence of impact on subsequent or other components beyond the MISP instance itself.
Weakness rationale
- CWE-502 The phar stream wrapper causes PHP to invoke unserialize() implicitly whenever a filesystem operation resolves to a phar archive. An attacker who can influence the path argument (e.g., via argument injection) can supply a crafted phar file, triggering deserialization of attacker-controlled data and leading to code execution. This is the primary and most specific weakness.
- CWE-74 The phar stream wrapper is a special element of the PHP runtime that was not neutralized (unregistered) in the MISP entry points. Its presence allows downstream filesystem calls to be subverted into deserialization sinks. This is a secondary, broader characterization of the same issue.
Attack pattern rationale
- CAPEC-570 The core attack mechanism is that the phar stream wrapper turns a filesystem call on a caller-influenced path into an implicit unserialize() invocation. An attacker crafts a phar archive containing a malicious serialized payload and causes the application to perform a filesystem operation on that path, triggering deserialization and code execution. CAPEC-570 is the closest match. Uncertainty: the exact injection vector (which specific MISP endpoint or console command accepts the path) is not detailed in the patch, but the deserialization sink is explicitly described in the commit message.
- CAPEC-100 The phar stream wrapper is a trusted, built-in PHP component that the attacker leverages in the MISP runtime environment where it serves no legitimate purpose. The attacker does not need to exploit a flaw in the wrapper itself; rather, its mere presence in the runtime provides the primitive. This is a secondary mapping; CAPEC-570 is preferred as the primary because it more precisely describes the deserialization mechanism.
Assumptions to verify
- The affected version range is inferred from the tag_version_boundary (v2.5.47, 42 commits after fix), suggesting the fix is included in v2.5.47 and earlier versions are affected. The explicit context lists affected_version and fixed_version as null, so the exact boundary is uncertain.
- PR:L is assumed because MISP is an authenticated threat-intelligence platform; however, the patch does not explicitly state whether the vulnerable code path requires authentication. If the argument-injection vector is reachable unauthenticated, PR should be N.
- AC:H is assumed because crafting a valid phar archive and identifying the correct code path for the filesystem call is non-trivial; the commit describes it as an 'argument-injection exploit,' implying specific conditions must be met.
- The CAPEC-570 mapping is based on the commit message's explicit description of the phar wrapper as an 'unserialize() sink'; the exact MISP endpoint or console command that accepts the attacker-influenced path is not identified in the patch.
- The commit message references 'the job-argument guard reverted,' implying a prior guard existed and was removed, making the phar wrapper the remaining defense. The exact prior guard is not described in this patch.
- The Co-Authored-By line lists 'Claude Opus 5 (1M context)' as a co-author; this is recorded in the metadata as a remediation developer but is an AI assistant, not a human contributor. It is excluded from credits to avoid attributing a CVE credit to a non-human entity.
Model comparison
Selected qwen3.8:27b
by deterministic-consensus-v1
The selected result is closest to model consensus; this heuristic does not establish factual correctness and human review remains required.
| Model | Score | Agreement | Confidence | Assumptions |
|---|---|---|---|---|
qwen3.8:27b |
4 | 9 | medium | 6 |
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CVE-2026-95606 (GCVE-0-2026-95606)
Vulnerability from cvelistv5 – Published: 2026-10-07 17:07 – Updated: 2026-10-07 17:49 X_Open Source
VLAI
EPSS
VEX
Title
WordPress The Events Calendar plugin <= 6.17.4 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in Liquid Web / StellarWP The Events Calendar allows Object Injection.
This issue affects The Events Calendar: from n/a through 6.17.4.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 17:49 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Liquid Web / StellarWP | The Events Calendar |
Affected:
n/a , ≤ 6.17.4
(custom)
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CVE-2026-95603 (GCVE-0-2026-95603)
Vulnerability from cvelistv5 – Published: 2026-09-23 18:14 – Updated: 2026-09-23 19:27
VLAI
EPSS
VEX
Title
WordPress Reycob Product Import Export plugin <= 2.3.0 - PHP Object Injection vulnerability
Summary
Shop manager PHP Object Injection in Reycob Product Import Export <= 2.3.0 versions.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 19:27 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Victor Rodriguez | Reycob Product Import Export |
Affected:
n/a , ≤ 2.3.0
(custom)
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CVE-2026-95534 (GCVE-0-2026-95534)
Vulnerability from cvelistv5 – Published: 2026-10-07 17:00 – Updated: 2026-10-07 17:32 X_Open Source
VLAI
EPSS
VEX
Title
WordPress Unlimited Elements For Elementor (Free Widgets, Addons, Templates) plugin <= 2.0.19 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in Unlimited Elements Unlimited Elements For Elementor (Free Widgets, Addons, Templates) allows Object Injection.
This issue affects Unlimited Elements For Elementor (Free Widgets, Addons, Templates): from n/a through 2.0.19.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 17:32 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Unlimited Elements | Unlimited Elements For Elementor (Free Widgets, Addons, Templates) |
Affected:
n/a , ≤ 2.0.19
(custom)
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CVE-2026-95531 (GCVE-0-2026-95531)
Vulnerability from cvelistv5 – Published: 2026-09-30 12:27 – Updated: 2026-09-30 13:27
VLAI
EPSS
VEX
Title
WordPress Conversational Forms for ChatBot plugin <= 1.5.0 - PHP Object Injection vulnerability
Summary
Subscriber PHP Object Injection in Conversational Forms for ChatBot <= 1.5.0 versions.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 13:06 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| QuantumCloud | Conversational Forms for ChatBot |
Affected:
n/a , ≤ 1.5.0
(custom)
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CVE-2026-94683 (GCVE-0-2026-94683)
Vulnerability from cvelistv5 – Published: 2026-09-30 12:27 – Updated: 2026-09-30 13:27
VLAI
EPSS
VEX
Title
WordPress DesignSetGo plugin <= 2.8.0 - PHP Object Injection vulnerability
Summary
Contributor PHP Object Injection in DesignSetGo <= 2.8.0 versions.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 13:06 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Justin Nealey | DesignSetGo |
Affected:
n/a , ≤ 2.8.0
(custom)
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CVE-2026-94678 (GCVE-0-2026-94678)
Vulnerability from cvelistv5 – Published: 2026-09-30 12:27 – Updated: 2026-09-30 13:27
VLAI
EPSS
VEX
Title
WordPress Go Live Update Urls plugin <= 7.0.8 - PHP Object Injection vulnerability
Summary
Contributor PHP Object Injection in Go Live Update Urls <= 7.0.8 versions.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 13:06 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Mat Lipe | Go Live Update Urls |
Affected:
n/a , ≤ 7.0.8
(custom)
|
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CVE-2026-94677 (GCVE-0-2026-94677)
Vulnerability from cvelistv5 – Published: 2026-09-30 12:27 – Updated: 2026-09-30 13:27
VLAI
EPSS
VEX
Title
WordPress Kadence WooCommerce Email Designer plugin <= 1.5.19.1 - PHP Object Injection vulnerability
Summary
Shop manager PHP Object Injection in Kadence WooCommerce Email Designer <= 1.5.19.1 versions.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 13:06 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Nexcess | Kadence WooCommerce Email Designer |
Affected:
n/a , ≤ 1.5.19.1
(custom)
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CVE-2026-94676 (GCVE-0-2026-94676)
Vulnerability from cvelistv5 – Published: 2026-10-10 14:00 – Updated: 2026-10-11 12:13 X_Open Source
VLAI
EPSS
VEX
Title
WordPress Tainacan plugin <= 1.3.0 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in Tainacan Community Tainacan tainacan allows Object Injection.This issue affects Tainacan: from n/a through 1.3.0.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-11 11:59 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Tainacan Community | Tainacan |
Affected:
0 , ≤ 1.3.0
(custom)
|
Date Public
2026-10-08 13:04
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CVE-2026-94568 (GCVE-0-2026-94568)
Vulnerability from cvelistv5 – Published: 2026-10-09 10:00 – Updated: 2026-10-09 20:18 X_Open Source
VLAI
EPSS
VEX
Title
WordPress Pay with Vipps for WooCommerce plugin <= 6.2.0 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in WP Hosting AS Pay with Vipps for WooCommerce woo-vipps allows Object Injection.This issue affects Pay with Vipps for WooCommerce: from n/a through 6.2.0.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-09 20:17 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| WP Hosting AS | Pay with Vipps for WooCommerce |
Affected:
0 , ≤ 6.2.0
(custom)
|
Date Public
2026-10-03 17:47
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"title": "WordPress Pay with Vipps for WooCommerce plugin \u003c= 6.2.0 - PHP Object Injection vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "21595511-bba5-4825-b968-b78d1f9984a3",
"assignerShortName": "Patchstack",
"cveId": "CVE-2026-94568",
"datePublished": "2026-10-09T10:00:19.289Z",
"dateReserved": "2026-09-21T20:00:09.445Z",
"dateUpdated": "2026-10-09T20:18:08.028Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Mitigation
Architecture and Design
Implementation
If available, use the signing/sealing features of the programming language to assure that deserialized data has not been tainted. For example, a hash-based message authentication code (HMAC) could be used to ensure that data has not been modified.
Mitigation
Implementation
When deserializing data, populate a new object rather than just deserializing. The result is that the data flows through safe input validation and that the functions are safe.
Mitigation
Implementation
Explicitly define a final object() to prevent deserialization.
Mitigation
Architecture and Design
Implementation
- Make fields transient to protect them from deserialization.
- An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.
Mitigation
Implementation
Avoid having unnecessary types or gadgets (a sequence of instances and method invocations that can self-execute during the deserialization process, often found in libraries) available that can be leveraged for malicious ends. This limits the potential for unintended or unauthorized types and gadgets to be leveraged by the attacker. Add only acceptable classes to an allowlist. Note: new gadgets are constantly being discovered, so this alone is not a sufficient mitigation.
Mitigation
Architecture and Design
Implementation
Employ cryptography of the data or code for protection. However, it's important to note that it would still be client-side security. This is risky because if the client is compromised then the security implemented on the client (the cryptography) can be bypassed.
Mitigation MIT-29
Operation
Strategy: Firewall
Use an application firewall that can detect attacks against this weakness. It can be beneficial in cases in which the code cannot be fixed (because it is controlled by a third party), as an emergency prevention measure while more comprehensive software assurance measures are applied, or to provide defense in depth [REF-1481].
CAPEC-586: Object Injection
An adversary attempts to exploit an application by injecting additional, malicious content during its processing of serialized objects. Developers leverage serialization in order to convert data or state into a static, binary format for saving to disk or transferring over a network. These objects are then deserialized when needed to recover the data/state. By injecting a malformed object into a vulnerable application, an adversary can potentially compromise the application by manipulating the deserialization process. This can result in a number of unwanted outcomes, including remote code execution.