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.
4797 vulnerabilities reference this CWE, most recent first.
GHSA-CF3C-FFFP-34QH
Vulnerability from github – Published: 2018-10-29 19:05 – Updated: 2024-09-13 18:11In conference-scheduler-cli, a pickle.load call on imported data allows remote attackers to execute arbitrary code via a crafted .pickle file, as demonstrated by Python code that contains an os.system call.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "conference-scheduler-cli"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "0.10.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2018-14572"
],
"database_specific": {
"cwe_ids": [
"CWE-502",
"CWE-78"
],
"github_reviewed": true,
"github_reviewed_at": "2020-06-16T21:31:12Z",
"nvd_published_at": null,
"severity": "HIGH"
},
"details": "In conference-scheduler-cli, a pickle.load call on imported data allows remote attackers to execute arbitrary code via a crafted .pickle file, as demonstrated by Python code that contains an os.system call.",
"id": "GHSA-cf3c-fffp-34qh",
"modified": "2024-09-13T18:11:18Z",
"published": "2018-10-29T19:05:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-14572"
},
{
"type": "WEB",
"url": "https://github.com/PyconUK/ConferenceScheduler-cli/issues/19"
},
{
"type": "PACKAGE",
"url": "https://github.com/PyconUK/ConferenceScheduler-cli"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-cf3c-fffp-34qh"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/conference-scheduler-cli/PYSEC-2018-64.yaml"
},
{
"type": "WEB",
"url": "https://joel-malwarebenchmark.github.io/blog/2020/04/25/cve-2018-14572-conference-scheduler-cli"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "conference-scheduler-cli Arbitrary Code Execution"
}
GHSA-CF3H-VJG3-V2HX
Vulnerability from github – Published: 2024-01-19 15:30 – Updated: 2026-04-28 21:33Deserialization of Untrusted Data vulnerability in ProfilePress Membership Team Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content – ProfilePress.This issue affects Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content – ProfilePress: from n/a through 4.3.2.
{
"affected": [],
"aliases": [
"CVE-2022-45083"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-01-19T15:15:08Z",
"severity": "MODERATE"
},
"details": "Deserialization of Untrusted Data vulnerability in ProfilePress Membership Team Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile \u0026 Restrict Content \u2013 ProfilePress.This issue affects Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile \u0026 Restrict Content \u2013 ProfilePress: from n/a through 4.3.2.",
"id": "GHSA-cf3h-vjg3-v2hx",
"modified": "2026-04-28T21:33:50Z",
"published": "2024-01-19T15:30:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-45083"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/vulnerability/wp-user-avatar/wordpress-profilepress-plugin-4-3-2-auth-php-object-injection-vulnerability?_s_id=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-CF6J-797Q-26F6
Vulnerability from github – Published: 2025-06-27 12:31 – Updated: 2026-04-01 18:35Deserialization of Untrusted Data vulnerability in pebas CouponXxL allows Object Injection. This issue affects CouponXxL: from n/a through 3.0.0.
{
"affected": [],
"aliases": [
"CVE-2025-52725"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-06-27T12:15:39Z",
"severity": "CRITICAL"
},
"details": "Deserialization of Untrusted Data vulnerability in pebas CouponXxL allows Object Injection. This issue affects CouponXxL: from n/a through 3.0.0.",
"id": "GHSA-cf6j-797q-26f6",
"modified": "2026-04-01T18:35:35Z",
"published": "2025-06-27T12:31:17Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-52725"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/wordpress/theme/couponxxl/vulnerability/wordpress-couponxxl-3-0-0-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-CF6R-3WGC-H863
Vulnerability from github – Published: 2020-05-15 18:58 – Updated: 2023-09-14 15:07A flaw was discovered in jackson-databind in versions before 2.9.10, 2.8.11.5, and 2.6.7.3, where it would permit polymorphic deserialization of a malicious object using commons-configuration 1 and 2 JNDI classes. An attacker could use this flaw to execute arbitrary code.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 2.6.7.2"
},
"package": {
"ecosystem": "Maven",
"name": "com.fasterxml.jackson.core:jackson-databind"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.6.7.3"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 2.8.11.4"
},
"package": {
"ecosystem": "Maven",
"name": "com.fasterxml.jackson.core:jackson-databind"
},
"ranges": [
{
"events": [
{
"introduced": "2.7.0"
},
{
"fixed": "2.8.11.5"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.fasterxml.jackson.core:jackson-databind"
},
"ranges": [
{
"events": [
{
"introduced": "2.9.0"
},
{
"fixed": "2.9.10"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2019-14892"
],
"database_specific": {
"cwe_ids": [
"CWE-200",
"CWE-502"
],
"github_reviewed": true,
"github_reviewed_at": "2020-04-23T19:29:41Z",
"nvd_published_at": "2020-03-02T17:15:00Z",
"severity": "HIGH"
},
"details": "A flaw was discovered in jackson-databind in versions before 2.9.10, 2.8.11.5, and 2.6.7.3, where it would permit polymorphic deserialization of a malicious object using commons-configuration 1 and 2 JNDI classes. An attacker could use this flaw to execute arbitrary code.",
"id": "GHSA-cf6r-3wgc-h863",
"modified": "2023-09-14T15:07:13Z",
"published": "2020-05-15T18:58:58Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-14892"
},
{
"type": "WEB",
"url": "https://github.com/FasterXML/jackson-databind/issues/2462"
},
{
"type": "WEB",
"url": "https://github.com/FasterXML/jackson-databind/commit/41b7f9b90149e9d44a65a8261a8deedc7186f6af"
},
{
"type": "WEB",
"url": "https://github.com/FasterXML/jackson-databind/commit/819cdbcab51c6da9fb896380f2d46e9b7d4fdc3b"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2020:0729"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14892"
},
{
"type": "PACKAGE",
"url": "https://github.com/FasterXML/jackson-databind"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0@%3Cissues.bookkeeper.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/rf1bbc0ea4a9f014cf94df9a12a6477d24a27f52741dbc87f2fd52ff2@%3Cissues.geode.apache.org%3E"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20200904-0005"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "Polymorphic deserialization of malicious object in jackson-databind"
}
GHSA-CF85-JM34-89C3
Vulnerability from github – Published: 2026-07-04 03:31 – Updated: 2026-07-04 03:31picklescan before 0.0.30 fails to detect the asyncio.unix_events._UnixSubprocessTransport._start function in pickle reduce methods, allowing remote code execution. Attackers can craft malicious pickle files embedding this built-in function that evade detection but execute arbitrary commands when loaded.
{
"affected": [],
"aliases": [
"CVE-2025-71364"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-04T02:16:22Z",
"severity": "HIGH"
},
"details": "picklescan before 0.0.30 fails to detect the asyncio.unix_events._UnixSubprocessTransport._start function in pickle reduce methods, allowing remote code execution. Attackers can craft malicious pickle files embedding this built-in function that evade detection but execute arbitrary commands when loaded.",
"id": "GHSA-cf85-jm34-89c3",
"modified": "2026-07-04T03:31:02Z",
"published": "2026-07-04T03:31:02Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/mmaitre314/picklescan/security/advisories/GHSA-q77w-mwjj-7mqx"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-71364"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/picklescan-arbitrary-code-execution-via-undetected-asyncio-unix-events-unixsubprocesstransport-start"
}
],
"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-CFFC-MXRF-MHH4
Vulnerability from github – Published: 2025-12-29 22:44 – Updated: 2025-12-29 22:44Summary
Picklescan uses numpy.f2py.crackfortran.param_eval, which is a function in numpy to execute remote pickle files.
Details
The attack payload executes in the following steps:
- First, the attacker crafts the payload by calling the numpy.f2py.crackfortran.param_eval function via reduce method.
- Then, when the victim checks whether the pickle file is safe by using the Picklescan library and this library doesn't detect any dangerous functions, they decide to use pickle.load() on this malicious pickle file, thus leading to remote code execution.
PoC
class RCE:
def __reduce__(self):
from numpy.f2py.crackfortran import param_eval
return (param_eval,("os.system('ls')",None,None,None))
Impact
Any organization or individual relying on picklescan to detect malicious pickle files inside PyTorch models. Attackers can embed malicious code in pickle file that remains undetected but executes when the pickle file is loaded. Attackers can distribute infected pickle files across ML models, APIs, or saved Python objects.
Report by
Pinji Chen (cpj24@mails.tsinghua.edu.cn) from the NISL lab (https://netsec.ccert.edu.cn/about) at Tsinghua University, Guanheng Liu (coolwind326@gmail.com).
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "picklescan"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.0.33"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-502",
"CWE-94"
],
"github_reviewed": true,
"github_reviewed_at": "2025-12-29T22:44:26Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "### Summary\nPicklescan uses numpy.f2py.crackfortran.param_eval, which is a function in numpy to execute remote pickle files.\n\n### Details\nThe attack payload executes in the following steps:\n\n- First, the attacker crafts the payload by calling the numpy.f2py.crackfortran.param_eval function via reduce method.\n- Then, when the victim checks whether the pickle file is safe by using the Picklescan library and this library doesn\u0027t detect any dangerous functions, they decide to use pickle.load() on this malicious pickle file, thus leading to remote code execution.\n\n\n### PoC\n```\nclass RCE:\n def __reduce__(self):\n from numpy.f2py.crackfortran import param_eval\n return (param_eval,(\"os.system(\u0027ls\u0027)\",None,None,None))\n```\n\n\n### Impact\nAny organization or individual relying on picklescan to detect malicious pickle files inside PyTorch models.\nAttackers can embed malicious code in pickle file that remains undetected but executes when the pickle file is loaded.\nAttackers can distribute infected pickle files across ML models, APIs, or saved Python objects.\n\n### Report by\nPinji Chen (cpj24@mails.tsinghua.edu.cn) from the NISL lab (https://netsec.ccert.edu.cn/about) at Tsinghua University, Guanheng Liu (coolwind326@gmail.com).",
"id": "GHSA-cffc-mxrf-mhh4",
"modified": "2025-12-29T22:44:27Z",
"published": "2025-12-29T22:44:26Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/mmaitre314/picklescan/security/advisories/GHSA-cffc-mxrf-mhh4"
},
{
"type": "WEB",
"url": "https://github.com/mmaitre314/picklescan/pull/53"
},
{
"type": "WEB",
"url": "https://github.com/mmaitre314/picklescan/commit/70c1c6c31beb6baaf52c8db1b6c3c0e84a6f9dab"
},
{
"type": "PACKAGE",
"url": "https://github.com/mmaitre314/picklescan"
},
{
"type": "WEB",
"url": "https://github.com/mmaitre314/picklescan/releases/tag/v0.0.33"
}
],
"schema_version": "1.4.0",
"severity": [],
"summary": "Picklescan is vulnerable to RCE via missing detection when calling numpy.f2py.crackfortran.param_eval"
}
GHSA-CG2Q-C8HJ-PQC3
Vulnerability from github – Published: 2022-05-14 01:14 – Updated: 2022-05-14 01:14The Management Console in GitHub Enterprise 2.8.x before 2.8.7 has a deserialization issue that allows unauthenticated remote attackers to execute arbitrary code. This occurs because the enterprise session secret is always the same, and can be found in the product's source code. By sending a crafted cookie signed with this secret, one can call Marshal.load with arbitrary data, which is a problem because the Marshal data format allows Ruby objects.
{
"affected": [],
"aliases": [
"CVE-2017-18365"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-03-28T06:29:00Z",
"severity": "CRITICAL"
},
"details": "The Management Console in GitHub Enterprise 2.8.x before 2.8.7 has a deserialization issue that allows unauthenticated remote attackers to execute arbitrary code. This occurs because the enterprise session secret is always the same, and can be found in the product\u0027s source code. By sending a crafted cookie signed with this secret, one can call Marshal.load with arbitrary data, which is a problem because the Marshal data format allows Ruby objects.",
"id": "GHSA-cg2q-c8hj-pqc3",
"modified": "2022-05-14T01:14:35Z",
"published": "2022-05-14T01:14:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-18365"
},
{
"type": "WEB",
"url": "https://enterprise.github.com/releases/2.8.7/notes"
},
{
"type": "WEB",
"url": "https://www.exablue.de/blog/2017-03-15-github-enterprise-remote-code-execution.html"
}
],
"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"
}
]
}
GHSA-CG2V-9V73-CCWP
Vulnerability from github – Published: 2022-10-04 00:00 – Updated: 2025-10-22 00:32Microsoft Exchange Server Remote Code Execution Vulnerability.
{
"affected": [],
"aliases": [
"CVE-2022-41082"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-10-03T01:15:00Z",
"severity": "HIGH"
},
"details": "Microsoft Exchange Server Remote Code Execution Vulnerability.",
"id": "GHSA-cg2v-9v73-ccwp",
"modified": "2025-10-22T00:32:37Z",
"published": "2022-10-04T00:00:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-41082"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41082"
},
{
"type": "WEB",
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-41082"
},
{
"type": "WEB",
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-41082"
},
{
"type": "WEB",
"url": "https://www.kb.cert.org/vuls/id/915563"
},
{
"type": "WEB",
"url": "https://www.secpod.com/blog/microsoft-november-2022-patch-tuesday-patches-65-vulnerabilities-including-6-zero-days"
},
{
"type": "WEB",
"url": "https://www.vicarius.io/vsociety/posts/cve-2022-41082-microsoft-exchange-server-remote-code-execution-vulnerability-detection-script"
},
{
"type": "WEB",
"url": "https://www.vicarius.io/vsociety/posts/cve-2022-41082-microsoft-exchange-server-remote-code-execution-vulnerability-mitigation-script"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/170066/Microsoft-Exchange-ProxyNotShell-Remote-Code-Execution.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CG3J-PW7G-WGVP
Vulnerability from github – Published: 2023-12-31 12:30 – Updated: 2026-04-28 21:33Deserialization of Untrusted Data vulnerability in Presslabs Theme per user.This issue affects Theme per user: from n/a through 1.0.1.
{
"affected": [],
"aliases": [
"CVE-2023-52181"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-12-31T10:15:08Z",
"severity": "CRITICAL"
},
"details": "Deserialization of Untrusted Data vulnerability in Presslabs Theme per user.This issue affects Theme per user: from n/a through 1.0.1.",
"id": "GHSA-cg3j-pw7g-wgvp",
"modified": "2026-04-28T21:33:40Z",
"published": "2023-12-31T12:30:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52181"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/vulnerability/theme-per-user/wordpress-theme-per-user-plugin-1-0-1-unauthenticated-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:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CG49-HRJ4-3RPR
Vulnerability from github – Published: 2024-06-04 12:31 – Updated: 2024-06-05 13:26Deseriliazation of untrusted data can occur in versions 3.7.0 or newer of Ydata's ydata-profiling open-source library, enabling a maliciously crafted dataset to run arbitrary code on an end user's system when loaded.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "ydata-profiling"
},
"ranges": [
{
"events": [
{
"introduced": "3.7.0"
},
{
"last_affected": "4.8.3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-37064"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": true,
"github_reviewed_at": "2024-06-05T13:26:29Z",
"nvd_published_at": "2024-06-04T12:15:13Z",
"severity": "HIGH"
},
"details": "Deseriliazation of untrusted data can occur in versions 3.7.0 or newer of Ydata\u0027s ydata-profiling open-source library, enabling a maliciously crafted dataset to run arbitrary code on an end user\u0027s system when loaded.",
"id": "GHSA-cg49-hrj4-3rpr",
"modified": "2024-06-05T13:26:29Z",
"published": "2024-06-04T12:31:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-37064"
},
{
"type": "PACKAGE",
"url": "https://github.com/ydataai/ydata-profiling"
},
{
"type": "WEB",
"url": "https://hiddenlayer.com/sai-security-advisory/ydata-june2024"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "ydata unsafe deserialization"
}
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.