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.
5115 vulnerabilities reference this CWE, most recent first.
CVE-2026-82259 (GCVE-0-2026-82259)
Vulnerability from cvelistv5 – Published: 2026-08-28 10:49 – Updated: 2026-08-28 13:51
VLAI
EPSS
VEX
Title
SvelteKit 2.49.0 before 2.53.3 Denial of Service via form
Summary
SvelteKit versions from 2.49.0 through 2.53.2 (fixed in 2.53.3) contain a deserialization expansion issue in the experimental form remote function. When an application enables experimental.remoteFunctions and uses the form function to process the files array without validating files.length or individual file sizes, an attacker can submit relatively small inputs that expand into very large file arrays, leading to expensive processing and denial of service.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 13:51 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/sveltejs/kit/security/advisori… | vendor-advisory |
| https://www.vulncheck.com/advisories/sveltekit-2.… | third-party-advisory |
Impacted products
Date Public
2026-02-26 00:00
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CVE-2026-82222 (GCVE-0-2026-82222)
Vulnerability from cvelistv5 – Published: 2026-08-28 10:46 – Updated: 2026-08-28 14:50 X_Open Source
VLAI
EPSS
VEX
Title
WordPress GiveWP plugin <= 4.16.7.1 - Remote Code Execution (RCE) vulnerability
Summary
Deserialization of Untrusted Data vulnerability in Liquid Web / StellarWP GiveWP allows Object Injection.
This issue affects GiveWP: from n/a through 4.16.7.1.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 14:50 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
| https://patchstack.com/articles/unauthenticated-p… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Liquid Web / StellarWP | GiveWP |
Affected:
n/a , ≤ 4.16.7.1
(custom)
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CVE-2026-81757 (GCVE-0-2026-81757)
Vulnerability from cvelistv5 – Published: 2026-08-28 14:33 – Updated: 2026-08-28 16:03
VLAI
EPSS
VEX
Title
WordPress Rank Math SEO plugin <= 1.0.276 - Remote Code Execution (RCE) vulnerability
Summary
Author Remote Code Execution (RCE) in Rank Math SEO <= 1.0.276 versions.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 16:03 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 | |
|---|---|---|---|
| Rank Math SEO | Rank Math SEO |
Affected:
n/a , ≤ 1.0.276
(custom)
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CVE-2026-80428 (GCVE-0-2026-80428)
Vulnerability from cvelistv5 – Published: 2026-08-26 15:44 – Updated: 2026-08-29 02:41
VLAI
EPSS
VEX
Title
ILIAS before 9.22, 10.10 and 11.3 Unauthenticated PHP Object Injection via Shibboleth Logout Endpoint
Summary
ILIAS deserialises stored session data for an unauthenticated caller. The Shibboleth back-channel endpoint at components/ILIAS/AuthShibboleth/resources/shib_logout.php runs in a context that ilInitialisation exempts from authentication, and its logout-notification handler locates the session to terminate by reading every live row of the session table and passing each row's stored data to a hand-written parser that calls unserialize without restricting which classes may be constructed. Any serialised object present in any session row is therefore instantiated on behalf of an anonymous request, and object destructors run when those objects are discarded. A serialised object can be placed into a session row without logging in, because the LTI authentication entry point stores request parameters into the session and is reachable on a path the same initialisation code exempts from authentication. A class bundled with the application writes a JSON-encoded structure to a file named by one of its own properties when it is destroyed, which places attacker-controlled content at an attacker-chosen path below the web root and results in code execution as the web server user. Versions 9.22, 10.10 and 11.3 remove the endpoint's logout-notification implementation.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-29 02:41 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/ILIAS-eLearning/ILIAS | product |
| https://github.com/ILIAS-eLearning/ILIAS/commit/f… | patch |
| https://www.vulncheck.com/advisories/ilias-before… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ILIAS-eLearning e.V. | ILIAS |
Affected:
0 , < 9.22
(custom)
Affected: 10.0 , < 10.10 (custom) Affected: 11.0 , < 11.3 (custom) cpe:2.3:a:ilias:ilias:*:*:*:*:*:*:*:* cpe:2.3:a:ilias:ilias:*:*:*:*:*:*:*:* cpe:2.3:a:ilias:ilias:*:*:*:*:*:*:*:* |
Date Public
2026-08-26 00:00
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CVE-2026-79657 (GCVE-0-2026-79657)
Vulnerability from cvelistv5 – Published: 2026-08-25 11:33 – Updated: 2026-08-25 15:58
VLAI
EPSS
VEX
Title
NLTK before 3.10.3 Remote Code Execution via Unsafe Pickle Deserialization
Summary
NLTK versions before 3.10.3 contain a remote code execution vulnerability in allowlisted pickle loaders that trust entire module namespaces instead of specific safe callables. Attackers can craft malicious pickle payloads invoking dangerous in-namespace functions like ReppTokenizer._execute and numpy.f2py.crackfortran.myeval through pickle REDUCE to execute arbitrary commands during model or tokenizer artifact loading.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 15:58 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/nltk/nltk/security/advisories/… | vendor-advisory |
| https://www.vulncheck.com/advisories/nltk-before-… | third-party-advisory |
Impacted products
Date Public
2026-08-11 00:00
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CVE-2026-78683 (GCVE-0-2026-78683)
Vulnerability from cvelistv5 – Published: 2026-08-25 01:30 – Updated: 2026-08-25 15:19
VLAI
EPSS
VEX
Title
NLTK before 3.10.0 Remote Code Execution via Unsafe Pickle Deserialization
Summary
NLTK before 3.10.0 (affected versions <=3.9.4) contains an unsafe pickle deserialization vulnerability in the TransitionParser.parse() method (nltk/parse/transitionparser.py). The method calls pickle_load() with the default restricted=False, routing deserialization through WarningUnpickler, which does not override find_class() and therefore permits arbitrary class resolution. When an application loads an attacker-crafted model file, embedded pickle gadget chains execute arbitrary Python code with the privileges of the user running the application. NLTK provides a RestrictedUnpickler for safe deserialization, but it is not used by production code paths. Fixed in 3.10.0.
Severity
9.6 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 15:19 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/nltk/nltk/security/advisories/… | vendor-advisory |
| https://www.vulncheck.com/advisories/nltk-before-… | third-party-advisory |
Impacted products
Date Public
2026-08-11 00:00
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CVE-2026-78614 (GCVE-0-2026-78614)
Vulnerability from cvelistv5 – Published: 2026-08-27 23:26 – Updated: 2026-08-28 16:40
VLAI
EPSS
VEX
Title
Dimension SQL Injection in Audit Report
Summary
WatchGuard Dimension contains an authenticated SQL injection vulnerability in the audit report feature which allows an authenticated user with report administration permissions gain arbitrary command execution as the Dimension WebUI process user by sending specially crafted requests.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 16:39 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://psirt.watchguard.com/CVE-2026-78614 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| WatchGuard | Dimension |
Affected:
2.0 , < 2.3.1
(semver)
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CVE-2026-78612 (GCVE-0-2026-78612)
Vulnerability from cvelistv5 – Published: 2026-08-27 23:26 – Updated: 2026-08-28 16:26
VLAI
EPSS
VEX
Title
Dimension SQL Injection in Scheduled Report
Summary
WatchGuard Dimension contains an authenticated SQL injection vulnerability in the scheduled report feature which allows an authenticated user with report administration permissions gain arbitrary command execution as the Dimension WebUI process user by sending specially crafted requests.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 16:26 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://psirt.watchguard.com/CVE-2026-78612 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| WatchGuard | Dimension |
Affected:
2.0 , < 2.3.1
(semver)
cpe:2.3:a:watchguard:dimension:*:*:*:*:*:*:*:* |
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CVE-2026-78572 (GCVE-0-2026-78572)
Vulnerability from cvelistv5 – Published: 2026-08-25 09:27 – Updated: 2026-08-25 18:07
VLAI
EPSS
VEX
Title
Kalles Addons <= 1.0.6 - Unauthenticated PHP Object Injection
Summary
The Kalles Addons plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.0.6 via deserialization of untrusted input. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 18:07 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| unknown | Kalles Addons |
Affected:
0 , ≤ 1.0.6
(semver)
|
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CVE-2026-78292 (GCVE-0-2026-78292)
Vulnerability from cvelistv5 – Published: 2026-08-27 09:00 – Updated: 2026-08-27 15:01
VLAI
EPSS
VEX
Title
WordPress Hash Form plugin <= 1.4.1 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Hash Form <= 1.4.1 versions.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 15:01 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 | |
|---|---|---|---|
| hashthemes | Hash Form |
Affected:
n/a , ≤ 1.4.1
(custom)
|
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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.