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-XV4H-3JG8-VF5R
Vulnerability from github – Published: 2026-06-17 18:35 – Updated: 2026-06-17 18:35Unauthenticated PHP Object Injection in Alukas < 3.0.0 versions.
{
"affected": [],
"aliases": [
"CVE-2026-39445"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-17T14:17:50Z",
"severity": "HIGH"
},
"details": "Unauthenticated PHP Object Injection in Alukas \u003c 3.0.0 versions.",
"id": "GHSA-xv4h-3jg8-vf5r",
"modified": "2026-06-17T18:35:54Z",
"published": "2026-06-17T18:35:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39445"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/wordpress/theme/alukas/vulnerability/wordpress-alukas-theme-3-0-0-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-XV5G-36C6-HQWJ
Vulnerability from github – Published: 2025-07-16 12:30 – Updated: 2026-04-01 18:35Deserialization of Untrusted Data vulnerability in jetmonsters JetFormBuilder allows Object Injection. This issue affects JetFormBuilder: from n/a through 3.5.1.2.
{
"affected": [],
"aliases": [
"CVE-2025-53990"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-07-16T11:15:26Z",
"severity": "HIGH"
},
"details": "Deserialization of Untrusted Data vulnerability in jetmonsters JetFormBuilder allows Object Injection. This issue affects JetFormBuilder: from n/a through 3.5.1.2.",
"id": "GHSA-xv5g-36c6-hqwj",
"modified": "2026-04-01T18:35:46Z",
"published": "2025-07-16T12:30:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-53990"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/wordpress/plugin/jetformbuilder/vulnerability/wordpress-jetformbuilder-plugin-3-5-1-2-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:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-XV5P-FJW5-VRJ6
Vulnerability from github – Published: 2025-11-25 20:39 – Updated: 2025-11-27 09:00Summary
The Fugue framework implements an RPC server system for distributed computing operations. In the core functionality of the RPC server implementation, I found that the _decode() function in fugue/rpc/flask.py directly uses cloudpickle.loads() to deserialize data without any sanitization. This creates a remote code execution vulnerability when malicious pickle data is processed by the RPC server.The vulnerability exists in the RPC communication mechanism where the client can send arbitrary serialized Python objects that will be deserialized on the server side, allowing attackers to execute arbitrary code on the victim's machine.
Details
_decode() function in fugue/rpc/flask.py directly uses cloudpickle.loads() to deserialize data without any sanitization.
PoC
-
Step1: The victim user starts an RPC server binding to open network using the Fugue framework. Here, I use the official RPC server code to initialize the server.
-
Step2: The attacker modifies the _encode() function in fugue/rpc/flask.py to inject malicious pickle data:
In this example, attacker modifies _encode to let the victim execute command “ls -l”
- Step 3: The attacker then uses the RPC client to send the malicious request
Fugue gives a demo video and the PoC in the attachment, along with modified flask.py. When users reproduce this issue, in the server side (as an victim), users can run python rpc_server.py. In the client side (as an attacker), users can first replace fugue/rpc/flask.py in pip site-packages with provided flask.py in the attachment and then run rpc_client.py.
Impact
Remote code execution in the victim's machine. Once the victim starts the RPCServer with network binding (especially 0.0.0.0), an attacker on the network can gain arbitrary code execution by connecting to the RPCServer and sending crafted pickle payloads. This vulnerability allows for:
- Complete system compromise
- Data exfiltration
- Lateral movement within the network
- Denial of service attacks
- Installation of persistent backdoors
Mitigation
- Replace unsafe deserialization: Replace
pickle.loads()with safer alternatives such as: - JSON serialization for simple data structures
- Protocol Buffers or MessagePack for complex data
-
If pickle must be used, implement a custom
Unpicklerwith a restrictedfind_class()method that only allows whitelisted classes -
Network security:
- If the service is intended for internal use only, bind to localhost (
127.0.0.1) instead of0.0.0.0 -
Implement authentication and authorization mechanisms
-
Security warnings: When starting the service on public interfaces, display clear security warnings to inform users about the risks.
Attachment: https://drive.google.com/file/d/1y8bBBp7dnWoT_WHBtdB0Fts4NRUIfdWi/view?usp=sharing
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "fugue"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "0.9.2"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2025-62703"
],
"database_specific": {
"cwe_ids": [
"CWE-502",
"CWE-78"
],
"github_reviewed": true,
"github_reviewed_at": "2025-11-25T20:39:15Z",
"nvd_published_at": "2025-11-25T22:15:47Z",
"severity": "HIGH"
},
"details": "### Summary\nThe Fugue framework implements an RPC server system for distributed computing operations. In the core\u00a0functionality of the RPC server implementation, I\u00a0found that\u00a0the\u00a0_decode()\u00a0function in\u00a0fugue/rpc/flask.py\u00a0directly uses\u00a0cloudpickle.loads()\u00a0to deserialize data\u00a0without any sanitization. This creates a remote code execution vulnerability when malicious pickle data is processed by the RPC\u00a0server.The vulnerability exists in the RPC communication mechanism where the client can\u00a0send arbitrary serialized Python objects that will be deserialized on the server\u00a0side, allowing\u00a0attackers to\u00a0execute arbitrary code\u00a0on the victim\u0027s machine.\n\n### Details\n_decode()\u00a0function in\u00a0fugue/rpc/flask.py directly uses\u00a0cloudpickle.loads()\u00a0to deserialize data\u00a0without any sanitization.\n\n### PoC\n* Step1:\nThe victim user starts an RPC\u00a0server binding to open network using\u00a0the Fugue framework. Here, I use the\u00a0official RPC\u00a0server code\u00a0to initialize\u00a0the server. \n\n* Step2:\nThe attacker modifies\u00a0the\u00a0_encode()\u00a0function\u00a0in\u00a0fugue/rpc/flask.py\u00a0to\u00a0inject malicious pickle data:\n\n\u003cimg width=\"740\" height=\"260\" alt=\"image\" src=\"https://github.com/user-attachments/assets/6064516b-e1a6-45fa-a91c-8e276bc4a106\" /\u003e\n\nIn this example, attacker modifies _encode to let the victim execute command \u201cls -l\u201d\n\n* Step 3:\nThe attacker then\u00a0uses the RPC client to send\u00a0the malicious\u00a0request\n\nFugue gives a demo video and the PoC in the attachment, along with modified flask.py. When users reproduce this issue, in the server side (as an victim), users can run python rpc_server.py. In the client side (as an attacker), users can first replace fugue/rpc/flask.py in pip site-packages with provided flask.py in the attachment and then run rpc_client.py.\n\n\n### Impact\nRemote code execution in the victim\u0027s machine. Once the victim starts\u00a0the RPCServer with network binding (especially\u00a00.0.0.0), an attacker on\u00a0the network\u00a0can gain arbitrary code execution by connecting to the RPCServer\u00a0and sending crafted pickle payloads. This vulnerability allows\u00a0for:\n\n- Complete system compromise\n- Data exfiltration\n- Lateral movement within the network\n- Denial of service attacks\n- Installation of persistent backdoors\n\n### Mitigation\n1. **Replace unsafe deserialization**: Replace `pickle.loads()` with safer alternatives such as:\n - JSON serialization for simple data structures\n - Protocol Buffers or MessagePack for complex data\n - If pickle must be used, implement a custom `Unpickler` with a restricted `find_class()` method that only allows whitelisted classes\n\n2. **Network security**: \n - If the service is intended for internal use only, bind to localhost (`127.0.0.1`) instead of `0.0.0.0`\n - Implement authentication and authorization mechanisms\n\n3. **Security warnings**: When starting the service on public interfaces, display clear security warnings to inform users about the risks.\n\nAttachment: https://drive.google.com/file/d/1y8bBBp7dnWoT_WHBtdB0Fts4NRUIfdWi/view?usp=sharing",
"id": "GHSA-xv5p-fjw5-vrj6",
"modified": "2025-11-27T09:00:39Z",
"published": "2025-11-25T20:39:15Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/fugue-project/fugue/security/advisories/GHSA-xv5p-fjw5-vrj6"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-62703"
},
{
"type": "WEB",
"url": "https://github.com/fugue-project/fugue/commit/6f25326779fd1f528198098d6287c5a863176fc0"
},
{
"type": "WEB",
"url": "https://drive.google.com/file/d/1y8bBBp7dnWoT_WHBtdB0Fts4NRUIfdWi/view?usp=sharing"
},
{
"type": "PACKAGE",
"url": "https://github.com/fugue-project/fugue"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "Fugue is Vulnerable to Remote Code Execution\u00a0by Pickle Deserialization via FlaskRPCServer"
}
GHSA-XV65-M527-X787
Vulnerability from github – Published: 2024-03-28 06:30 – Updated: 2025-05-29 21:31Deserialization of Untrusted Data vulnerability in Repute Infosystems ARMember.This issue affects ARMember: from n/a through 4.0.26.
{
"affected": [],
"aliases": [
"CVE-2024-30222"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-03-28T05:15:49Z",
"severity": "HIGH"
},
"details": "Deserialization of Untrusted Data vulnerability in Repute Infosystems ARMember.This issue affects ARMember: from n/a through 4.0.26.",
"id": "GHSA-xv65-m527-x787",
"modified": "2025-05-29T21:31:32Z",
"published": "2024-03-28T06:30:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-30222"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/vulnerability/armember-membership/wordpress-armember-plugin-4-0-26-php-object-injection-vulnerability?_s_id=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-XV7V-RF6G-XWRC
Vulnerability from github – Published: 2021-09-30 17:10 – Updated: 2021-09-30 16:49The PharStreamWrapper (aka phar-stream-wrapper) package 2.x before 2.1.1 and 3.x before 3.1.1 for TYPO3 does not prevent directory traversal, which allows attackers to bypass a deserialization protection mechanism, as demonstrated by a phar:///path/bad.phar/../good.phar URL.
{
"affected": [
{
"package": {
"ecosystem": "Packagist",
"name": "typo3/phar-stream-wrapper"
},
"ranges": [
{
"events": [
{
"introduced": "2.0.0"
},
{
"fixed": "2.1.1"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Packagist",
"name": "typo3/phar-stream-wrapper"
},
"ranges": [
{
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.1.1"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Packagist",
"name": "drupal/core"
},
"ranges": [
{
"events": [
{
"introduced": "7.0.0"
},
{
"fixed": "7.67.0"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Packagist",
"name": "drupal/core"
},
"ranges": [
{
"events": [
{
"introduced": "8.0.0"
},
{
"fixed": "8.6.16"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Packagist",
"name": "drupal/core"
},
"ranges": [
{
"events": [
{
"introduced": "8.7.0"
},
{
"fixed": "8.7.1"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Packagist",
"name": "drupal/drupal"
},
"ranges": [
{
"events": [
{
"introduced": "7.0.0"
},
{
"fixed": "7.67.0"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Packagist",
"name": "drupal/drupal"
},
"ranges": [
{
"events": [
{
"introduced": "8.0.0"
},
{
"fixed": "8.6.16"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Packagist",
"name": "drupal/drupal"
},
"ranges": [
{
"events": [
{
"introduced": "8.7.0"
},
{
"fixed": "8.7.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2019-11831"
],
"database_specific": {
"cwe_ids": [
"CWE-22",
"CWE-502"
],
"github_reviewed": true,
"github_reviewed_at": "2021-09-30T16:49:05Z",
"nvd_published_at": "2019-05-09T04:29:00Z",
"severity": "CRITICAL"
},
"details": "The PharStreamWrapper (aka phar-stream-wrapper) package 2.x before 2.1.1 and 3.x before 3.1.1 for TYPO3 does not prevent directory traversal, which allows attackers to bypass a deserialization protection mechanism, as demonstrated by a phar:///path/bad.phar/../good.phar URL.",
"id": "GHSA-xv7v-rf6g-xwrc",
"modified": "2021-09-30T16:49:05Z",
"published": "2021-09-30T17:10:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-11831"
},
{
"type": "WEB",
"url": "https://www.synology.com/security/advisory/Synology_SA_19_22"
},
{
"type": "WEB",
"url": "https://www.drupal.org/sa-core-2019-007"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2019/dsa-4445"
},
{
"type": "WEB",
"url": "https://typo3.org/security/advisory/typo3-psa-2019-007"
},
{
"type": "WEB",
"url": "https://seclists.org/bugtraq/2019/May/36"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z246UWBXBEKTQUDTLRJTC7XYBIO4IBE4"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U6JX7WR6DPMKCZQP7EYFACYXSGJ3K523"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/E3NUKPG7V4QEM6QXRMHYR4ABFMW5MM2P"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AUEXS4HRI4XZ2DTZMWAVQBYBTFSJ34AR"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6QDJVUJPUW3RZ4746SC6BX4F4T6ZXNBH"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/65ODQHDHWR74L6TCAPAQR5FQHG6MCXAW"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z246UWBXBEKTQUDTLRJTC7XYBIO4IBE4"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U6JX7WR6DPMKCZQP7EYFACYXSGJ3K523"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E3NUKPG7V4QEM6QXRMHYR4ABFMW5MM2P"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AUEXS4HRI4XZ2DTZMWAVQBYBTFSJ34AR"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6QDJVUJPUW3RZ4746SC6BX4F4T6ZXNBH"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/65ODQHDHWR74L6TCAPAQR5FQHG6MCXAW"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2019/05/msg00029.html"
},
{
"type": "WEB",
"url": "https://github.com/TYPO3/phar-stream-wrapper/releases/tag/v3.1.1"
},
{
"type": "WEB",
"url": "https://github.com/TYPO3/phar-stream-wrapper/releases/tag/v2.1.1"
},
{
"type": "PACKAGE",
"url": "https://github.com/TYPO3/phar-stream-wrapper"
},
{
"type": "WEB",
"url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/phar-stream-wrapper/CVE-2019-11831.yaml"
},
{
"type": "WEB",
"url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2019-11831.yaml"
},
{
"type": "WEB",
"url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2019-11831.yaml"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/108302"
}
],
"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"
}
],
"summary": "Directory Traversal in typo3/phar-stream-wrapper"
}
GHSA-XVPJ-RPWV-6V3H
Vulnerability from github – Published: 2025-02-24 15:30 – Updated: 2026-04-01 18:33Deserialization of Untrusted Data vulnerability in giuliopanda ADFO allows Object Injection. This issue affects ADFO: from n/a through 1.9.1.
{
"affected": [],
"aliases": [
"CVE-2025-27300"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-24T15:15:15Z",
"severity": "HIGH"
},
"details": "Deserialization of Untrusted Data vulnerability in giuliopanda ADFO allows Object Injection. This issue affects ADFO: from n/a through 1.9.1.",
"id": "GHSA-xvpj-rpwv-6v3h",
"modified": "2026-04-01T18:33:47Z",
"published": "2025-02-24T15:30:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-27300"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/wordpress/plugin/admin-form/vulnerability/wordpress-adfo-plugin-1-9-1-deserialization-of-untrusted-data-vulnerability?_s_id=cve"
}
],
"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-XVR9-JR9P-GRF3
Vulnerability from github – Published: 2022-05-24 17:43 – Updated: 2026-07-05 00:31PHP object injection in the Ajax endpoint of the backend in ForkCMS below version 5.8.3 allows an authenticated remote user to execute malicious code.
{
"affected": [],
"aliases": [
"CVE-2020-24036"
],
"database_specific": {
"cwe_ids": [
"CWE-502",
"CWE-915"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-03-04T13:15:00Z",
"severity": "HIGH"
},
"details": "PHP object injection in the Ajax endpoint of the backend in ForkCMS below version 5.8.3 allows an authenticated remote user to execute malicious code.",
"id": "GHSA-xvr9-jr9p-grf3",
"modified": "2026-07-05T00:31:17Z",
"published": "2022-05-24T17:43:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-24036"
},
{
"type": "WEB",
"url": "https://tech.feedyourhead.at/content/ForkCMS-PHP-Object-Injection-CVE-2020-24036"
},
{
"type": "WEB",
"url": "https://www.ait.ac.at/themen/cyber-security/pentesting/security-advisories/ait-sa-20210215-04"
},
{
"type": "WEB",
"url": "http://forkcms.com"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/161764/ForkCMS-PHP-Object-Injection.html"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2021/Mar/31"
}
],
"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-XVRC-CWRH-JW5G
Vulnerability from github – Published: 2025-08-20 09:30 – Updated: 2026-04-01 18:35Deserialization of Untrusted Data vulnerability in rascals Noisa allows Object Injection. This issue affects Noisa: from n/a through 2.6.0.
{
"affected": [],
"aliases": [
"CVE-2025-53560"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-08-20T08:15:42Z",
"severity": "HIGH"
},
"details": "Deserialization of Untrusted Data vulnerability in rascals Noisa allows Object Injection. This issue affects Noisa: from n/a through 2.6.0.",
"id": "GHSA-xvrc-cwrh-jw5g",
"modified": "2026-04-01T18:35:55Z",
"published": "2025-08-20T09:30:40Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-53560"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/wordpress/theme/noisa/vulnerability/wordpress-noisa-2-6-0-php-object-injection-vulnerability?_s_id=cve"
}
],
"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-XW4P-CRPJ-VJX2
Vulnerability from github – Published: 2021-08-25 14:46 – Updated: 2022-02-08 20:43Impact
The vulnerability may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream with a Java runtime version 14 to 8. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types.
Patches
If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.18.
Workarounds
See workarounds for the different versions covering all CVEs.
References
See full information about the nature of the vulnerability and the steps to reproduce it in XStream's documentation for CVE-2021-39152.
Credits
m0d9 of the Security Team of Alibaba Cloud found and reported the issue to XStream and provided the required information to reproduce it.
For more information
If you have any questions or comments about this advisory: * Open an issue in XStream * Contact us at XStream Google Group
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "com.thoughtworks.xstream:xstream"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.18"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2021-39152"
],
"database_specific": {
"cwe_ids": [
"CWE-502",
"CWE-918"
],
"github_reviewed": true,
"github_reviewed_at": "2021-08-23T18:22:29Z",
"nvd_published_at": "2021-08-23T19:15:00Z",
"severity": "HIGH"
},
"details": "### Impact\nThe vulnerability may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream with a Java runtime version 14 to 8. No user is affected, who followed the recommendation to setup XStream\u0027s security framework with a whitelist limited to the minimal required types.\n\n### Patches\nIf you rely on XStream\u0027s default blacklist of the [Security Framework](https://x-stream.github.io/security.html#framework), you will have to use at least version 1.4.18.\n\n### Workarounds\nSee [workarounds](https://x-stream.github.io/security.html#workaround) for the different versions covering all CVEs.\n\n### References\nSee full information about the nature of the vulnerability and the steps to reproduce it in XStream\u0027s documentation for [CVE-2021-39152](https://x-stream.github.io/CVE-2021-39152.html).\n\n### Credits\nm0d9 of the Security Team of Alibaba Cloud found and reported the issue to XStream and provided the required information to reproduce it.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [XStream](https://github.com/x-stream/xstream/issues)\n* Contact us at [XStream Google Group](https://groups.google.com/group/xstream-user)\n",
"id": "GHSA-xw4p-crpj-vjx2",
"modified": "2022-02-08T20:43:14Z",
"published": "2021-08-25T14:46:59Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/x-stream/xstream/security/advisories/GHSA-xw4p-crpj-vjx2"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-39152"
},
{
"type": "PACKAGE",
"url": "https://github.com/x-stream/xstream"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2021/09/msg00017.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20210923-0003"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2021/dsa-5004"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpujan2022.html"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpujul2022.html"
},
{
"type": "WEB",
"url": "https://x-stream.github.io/CVE-2021-39152.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "A Server-Side Forgery Request can be activated unmarshalling with XStream to access data streams from an arbitrary URL referencing a resource in an intranet or the local host"
}
GHSA-XW6M-6CGM-V7QM
Vulnerability from github – Published: 2026-06-30 21:31 – Updated: 2026-06-30 21:31IBM WebSphere Extreme Scale 8.6.1.0 through 8.6.1.6 ships three ObjectInputStream subclasses (WsObjectInputStream, ObjectStreamPool$ReusableInputStream, ObjectInputStreamResolver) that install no JEP-290 class filter; when Coherence is on the classpath, multiple RCE gadget chains including RemoteConstructor.readResolve and PriorityQueue/ExtractorComparator are confirmed working, allowing a post-login attacker who can write a session attribute or a LAN-adjacent attacker on the grid replication wire to execute arbitrary code on peer WAS JVMs
{
"affected": [],
"aliases": [
"CVE-2026-13759"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-30T20:17:28Z",
"severity": "HIGH"
},
"details": "IBM WebSphere Extreme Scale 8.6.1.0 through 8.6.1.6 ships three ObjectInputStream subclasses (WsObjectInputStream, ObjectStreamPool$ReusableInputStream, ObjectInputStreamResolver) that install no JEP-290 class filter; when Coherence is on the classpath, multiple RCE gadget chains including RemoteConstructor.readResolve and PriorityQueue/ExtractorComparator are confirmed working, allowing a post-login attacker who can write a session attribute or a LAN-adjacent attacker on the grid replication wire to execute arbitrary code on peer WAS JVMs",
"id": "GHSA-xw6m-6cgm-v7qm",
"modified": "2026-06-30T21:31:44Z",
"published": "2026-06-30T21:31:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13759"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7278595"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/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.