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.
4837 vulnerabilities reference this CWE, most recent first.
GHSA-CGVX-9447-VCCH
Vulnerability from github – Published: 2024-06-28 00:33 – Updated: 2025-01-21 18:28NLTK through 3.8.1 allows remote code execution if untrusted packages have pickled Python code, and the integrated data package download functionality is used. This affects, for example, averaged_perceptron_tagger and punkt.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "nltk"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.9"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-39705"
],
"database_specific": {
"cwe_ids": [
"CWE-300",
"CWE-502"
],
"github_reviewed": true,
"github_reviewed_at": "2024-06-28T21:11:25Z",
"nvd_published_at": "2024-06-27T22:15:10Z",
"severity": "HIGH"
},
"details": "NLTK through 3.8.1 allows remote code execution if untrusted packages have pickled Python code, and the integrated data package download functionality is used. This affects, for example, averaged_perceptron_tagger and punkt.",
"id": "GHSA-cgvx-9447-vcch",
"modified": "2025-01-21T18:28:57Z",
"published": "2024-06-28T00:33:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-39705"
},
{
"type": "WEB",
"url": "https://github.com/nltk/nltk/issues/2522"
},
{
"type": "WEB",
"url": "https://github.com/nltk/nltk/issues/3266"
},
{
"type": "WEB",
"url": "https://github.com/nltk/nltk/commit/441aecb7d33014bd08672232c6c8bb69c2ceaba2"
},
{
"type": "PACKAGE",
"url": "https://github.com/nltk/nltk"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/nltk/PYSEC-2024-167.yaml"
},
{
"type": "WEB",
"url": "https://www.vicarius.io/vsociety/posts/rce-in-python-nltk-cve-2024-39705-39706"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "ntlk unsafe deserialization vulnerability"
}
GHSA-CGXM-32GJ-CGQ2
Vulnerability from github – Published: 2025-09-05 18:31 – Updated: 2026-04-01 18:36Deserialization of Untrusted Data vulnerability in ExpressTech Systems Quiz And Survey Master allows Object Injection. This issue affects Quiz And Survey Master: from n/a through 10.2.5.
{
"affected": [],
"aliases": [
"CVE-2025-49401"
],
"database_specific": {
"cwe_ids": [
"CWE-266",
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-05T17:15:37Z",
"severity": "CRITICAL"
},
"details": "Deserialization of Untrusted Data vulnerability in ExpressTech Systems Quiz And Survey Master allows Object Injection. This issue affects Quiz And Survey Master: from n/a through 10.2.5.",
"id": "GHSA-cgxm-32gj-cgq2",
"modified": "2026-04-01T18:36:07Z",
"published": "2025-09-05T18:31:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-49401"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/Wordpress/Theme/smartSEO/vulnerability/wordpress-smart-seo-plugin-4-0-privilege-escalation-vulnerability?_s_id=cve"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/wordpress/plugin/quiz-master-next/vulnerability/wordpress-quiz-and-survey-master-plugin-10-2-5-php-object-injection-vulnerability?_s_id=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CH5X-8V45-X2XP
Vulnerability from github – Published: 2026-06-26 15:32 – Updated: 2026-06-26 15:32Unauthenticated PHP Object Injection in Uncanny Automator <= 7.3.1.2 versions.
{
"affected": [],
"aliases": [
"CVE-2026-56031"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-26T15:16:43Z",
"severity": "HIGH"
},
"details": "Unauthenticated PHP Object Injection in Uncanny Automator \u003c= 7.3.1.2 versions.",
"id": "GHSA-ch5x-8v45-x2xp",
"modified": "2026-06-26T15:32:16Z",
"published": "2026-06-26T15:32:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56031"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/wordpress/plugin/uncanny-automator/vulnerability/wordpress-uncanny-automator-plugin-7-3-1-2-php-object-injection-vulnerability?_s_id=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CH97-XGVH-P6MH
Vulnerability from github – Published: 2025-07-02 15:30 – Updated: 2025-07-07 15:30An unauthenticated remote command execution vulnerability exists in the applyCT component of the Hikvision Integrated Security Management Platform due to the use of a vulnerable version of the Fastjson library. The endpoint /bic/ssoService/v1/applyCT deserializes untrusted user input, allowing an attacker to trigger Fastjson's auto-type feature to load arbitrary Java classes. By referencing a malicious class via an LDAP URL, an attacker can achieve remote code execution on the underlying system.
{
"affected": [],
"aliases": [
"CVE-2025-34067"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-07-02T14:15:24Z",
"severity": "CRITICAL"
},
"details": "An unauthenticated remote command execution vulnerability exists in the applyCT component of the Hikvision Integrated Security Management Platform due to the use of a vulnerable version of the Fastjson library. The endpoint /bic/ssoService/v1/applyCT deserializes untrusted user input, allowing an attacker to trigger Fastjson\u0027s auto-type feature to load arbitrary Java classes. By referencing a malicious class via an LDAP URL, an attacker can achieve remote code execution on the underlying system.",
"id": "GHSA-ch97-xgvh-p6mh",
"modified": "2025-07-07T15:30:36Z",
"published": "2025-07-02T15:30:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-34067"
},
{
"type": "WEB",
"url": "https://github.com/PeiQi0/PeiQi-WIKI-Book/blob/main/docs/wiki/iot/HIKVISION/HIKVISION%20%E7%BB%BC%E5%90%88%E5%AE%89%E9%98%B2%E7%AE%A1%E7%90%86%E5%B9%B3%E5%8F%B0%20applyCT%20Fastjson%E8%BF%9C%E7%A8%8B%E5%91%BD%E4%BB%A4%E6%89%A7%E8%A1%8C%E6%BC%8F%E6%B4%9E.md"
},
{
"type": "WEB",
"url": "https://s4e.io/tools/hikvision-applyct-remote-code-execution"
},
{
"type": "WEB",
"url": "https://vulncheck.com/advisories/hikvision-hik-central-remote-command-execution"
},
{
"type": "WEB",
"url": "https://vulncheck.com/advisories/hikvision-ismp-rce-applyct"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-CH9P-8JP8-QJVQ
Vulnerability from github – Published: 2023-01-10 00:30 – Updated: 2023-01-13 09:30The WP Custom Admin Interface WordPress plugin before 7.29 unserialize user input provided via the settings, which could allow high privilege users such as admin to perform PHP Object Injection when a suitable gadget is present.
{
"affected": [],
"aliases": [
"CVE-2022-4043"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-01-09T23:15:00Z",
"severity": "HIGH"
},
"details": "The WP Custom Admin Interface WordPress plugin before 7.29 unserialize user input provided via the settings, which could allow high privilege users such as admin to perform PHP Object Injection when a suitable gadget is present.",
"id": "GHSA-ch9p-8jp8-qjvq",
"modified": "2023-01-13T09:30:26Z",
"published": "2023-01-10T00:30:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-4043"
},
{
"type": "WEB",
"url": "https://wpscan.com/vulnerability/ffff8c83-0a59-450a-9b40-c7f3af7205fc"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CHCF-C8W2-7X53
Vulnerability from github – Published: 2022-05-24 19:06 – Updated: 2022-05-24 19:06Trusty contains a vulnerability in all TAs whose deserializer does not reject messages with multiple occurrences of the same parameter. The deserialization of untrusted data might allow an attacker to exploit the deserializer to impact code execution.
{
"affected": [],
"aliases": [
"CVE-2021-34394"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-06-22T22:15:00Z",
"severity": "MODERATE"
},
"details": "Trusty contains a vulnerability in all TAs whose deserializer does not reject messages with multiple occurrences of the same parameter. The deserialization of untrusted data might allow an attacker to exploit the deserializer to impact code execution.",
"id": "GHSA-chcf-c8w2-7x53",
"modified": "2022-05-24T19:06:01Z",
"published": "2022-05-24T19:06:01Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-34394"
},
{
"type": "WEB",
"url": "https://nvidia.custhelp.com/app/answers/detail/a_id/5205"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-CHM9-4RM6-P4GF
Vulnerability from github – Published: 2026-07-04 03:31 – Updated: 2026-07-04 03:31picklescan before 0.0.28 fails to detect malicious pickle files that exploit torch._dynamo.guards.GuardBuilder.get function in reduce methods. Attackers can craft pickle files with embedded code that evades picklescan detection and executes arbitrary commands when loaded.
{
"affected": [],
"aliases": [
"CVE-2025-71353"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-04T02:16:21Z",
"severity": "HIGH"
},
"details": "picklescan before 0.0.28 fails to detect malicious pickle files that exploit torch._dynamo.guards.GuardBuilder.get function in reduce methods. Attackers can craft pickle files with embedded code that evades picklescan detection and executes arbitrary commands when loaded.",
"id": "GHSA-chm9-4rm6-p4gf",
"modified": "2026-07-04T03:31:02Z",
"published": "2026-07-04T03:31:02Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/mmaitre314/picklescan/security/advisories/GHSA-86cj-95qr-2p4f"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-71353"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/picklescan-remote-code-execution-via-torch-dynamo-guards-guardbuilder-get"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-CHP4-RV79-68J3
Vulnerability from github – Published: 2018-10-16 20:53 – Updated: 2024-04-19 19:24In Apache Ignite 2.3 or earlier, the serialization mechanism does not have a list of classes allowed for serialization/deserialization, which makes it possible to run arbitrary code when 3-rd party vulnerable classes are present in Ignite classpath. The vulnerability can be exploited if the one sends a specially prepared form of a serialized object to one of the deserialization endpoints of some Ignite components - discovery SPI, Ignite persistence, Memcached endpoint, socket steamer.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.apache.ignite:ignite-core"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2018-1295"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": true,
"github_reviewed_at": "2020-06-16T21:31:49Z",
"nvd_published_at": null,
"severity": "CRITICAL"
},
"details": "In Apache Ignite 2.3 or earlier, the serialization mechanism does not have a list of classes allowed for serialization/deserialization, which makes it possible to run arbitrary code when 3-rd party vulnerable classes are present in Ignite classpath. The vulnerability can be exploited if the one sends a specially prepared form of a serialized object to one of the deserialization endpoints of some Ignite components - discovery SPI, Ignite persistence, Memcached endpoint, socket steamer.",
"id": "GHSA-chp4-rv79-68j3",
"modified": "2024-04-19T19:24:01Z",
"published": "2018-10-16T20:53:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1295"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2018:2405"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-chp4-rv79-68j3"
},
{
"type": "PACKAGE",
"url": "https://github.com/apache/ignite"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/45e7d5e2c6face85aab693f5ae0616563132ff757e5a558da80d0209@%3Cdev.ignite.apache.org%3E"
},
{
"type": "WEB",
"url": "https://web.archive.org/web/20200227125559/http://www.securityfocus.com/bid/103692"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "Apache serialization mechanism does not have a list of classes allowed for serialization/deserialization"
}
GHSA-CHQ8-X439-4WHP
Vulnerability from github – Published: 2024-12-12 03:33 – Updated: 2024-12-12 03:33Microsoft SharePoint Remote Code Execution Vulnerability
{
"affected": [],
"aliases": [
"CVE-2024-49070"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-12-12T02:04:31Z",
"severity": "HIGH"
},
"details": "Microsoft SharePoint Remote Code Execution Vulnerability",
"id": "GHSA-chq8-x439-4whp",
"modified": "2024-12-12T03:33:04Z",
"published": "2024-12-12T03:33:04Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-49070"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49070"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CHXF-R8W4-QGR9
Vulnerability from github – Published: 2026-05-12 18:30 – Updated: 2026-05-14 21:30The CosyVoice project thru commit 6e01309e01bc93bbeb83bdd996b1182a81aaf11e (2025-30-21) contains an insecure deserialization vulnerability (CWE-502) in its model loading process. When loading model files (.pt) from a user-specified directory (via the --model_dir argument), the code uses torch.load() without the security-restrictive weights_only=True parameter. This allows the deserialization of arbitrary Python objects via the Pickle module. An attacker can exploit this by providing a maliciously crafted model directory containing .pt files with embedded pickle payloads. When a victim loads this directory using CosyVoice's web interface, the malicious payload is executed, leading to remote code execution on the victim's system.
{
"affected": [],
"aliases": [
"CVE-2026-31232"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-12T18:16:51Z",
"severity": "HIGH"
},
"details": "The CosyVoice project thru commit 6e01309e01bc93bbeb83bdd996b1182a81aaf11e (2025-30-21) contains an insecure deserialization vulnerability (CWE-502) in its model loading process. When loading model files (.pt) from a user-specified directory (via the --model_dir argument), the code uses torch.load() without the security-restrictive weights_only=True parameter. This allows the deserialization of arbitrary Python objects via the Pickle module. An attacker can exploit this by providing a maliciously crafted model directory containing .pt files with embedded pickle payloads. When a victim loads this directory using CosyVoice\u0027s web interface, the malicious payload is executed, leading to remote code execution on the victim\u0027s system.",
"id": "GHSA-chxf-r8w4-qgr9",
"modified": "2026-05-14T21:30:37Z",
"published": "2026-05-12T18:30:40Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31232"
},
{
"type": "WEB",
"url": "https://github.com/FunAudioLLM/CosyVoice"
},
{
"type": "WEB",
"url": "https://www.notion.so/CVE-2026-31232-35d1e1393188817f869cdcfce13402a8"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
Mitigation
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
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
Explicitly define a final object() to prevent deserialization.
Mitigation
- 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
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
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
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.