CWE-506
Allowed-with-ReviewEmbedded Malicious Code
Abstraction: Class · Status: Incomplete
The product contains code that appears to be malicious in nature.
548 vulnerabilities reference this CWE, most recent first.
GHSA-JXF5-7X3J-8J9M
Vulnerability from github – Published: 2020-09-03 18:19 – Updated: 2021-09-30 20:05Version 3.0.2 of load-from-cwd-or-npm contains malicious code. The malware breaks functionality of the purescript-installer package by injecting targeted code.
Recommendation
Upgrade to version 3.0.4 or later. There is no indication of further compromise.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "load-from-cwd-or-npm"
},
"ranges": [
{
"events": [
{
"introduced": "3.0.2"
},
{
"fixed": "3.0.4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.0.2"
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": true,
"github_reviewed_at": "2020-08-31T18:46:39Z",
"nvd_published_at": null,
"severity": "CRITICAL"
},
"details": "Version 3.0.2 of `load-from-cwd-or-npm` contains malicious code. The malware breaks functionality of the `purescript-installer` package by injecting targeted code.\n\n\n## Recommendation\n\nUpgrade to version 3.0.4 or later. There is no indication of further compromise.",
"id": "GHSA-jxf5-7x3j-8j9m",
"modified": "2021-09-30T20:05:11Z",
"published": "2020-09-03T18:19:14Z",
"references": [
{
"type": "WEB",
"url": "https://www.npmjs.com/advisories/1082"
}
],
"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": "Malicious Package in load-from-cwd-or-npm"
}
GHSA-JXR6-QRXX-2PH2
Vulnerability from github – Published: 2025-07-31 19:33 – Updated: 2026-07-21 17:20The num2words project was compromised via a phishing attack and two new versions were uploaded to PyPI containing malicious code. The affected versions have been removed from PyPI, and users are advised to remove the affected versions from their environments.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "num2words"
},
"ranges": [
{
"events": [
{
"introduced": "0.5.15"
},
{
"last_affected": "0.5.16"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "PyPI",
"name": "num2words"
},
"versions": [
"0.5.15"
]
},
{
"package": {
"ecosystem": "PyPI",
"name": "num2words"
},
"versions": [
"0.5.16"
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": true,
"github_reviewed_at": "2025-07-31T19:33:29Z",
"nvd_published_at": null,
"severity": "CRITICAL"
},
"details": "The `num2words` project was compromised via a phishing attack and two new versions were uploaded to PyPI containing malicious code. The affected versions have been removed from PyPI, and users are advised to remove the affected versions from their environments.",
"id": "GHSA-jxr6-qrxx-2ph2",
"modified": "2026-07-21T17:20:12Z",
"published": "2025-07-31T19:33:29Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/num2words/MAL-2025-6794.json"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/num2words/PYSEC-2025-72.yaml"
},
{
"type": "PACKAGE",
"url": "https://github.com/savoirfairelinux/num2words"
},
{
"type": "WEB",
"url": "https://nitter.tiekoetter.com/SFLinux/status/1949906299308953827"
},
{
"type": "WEB",
"url": "https://www.stepsecurity.io/blog/supply-chain-security-alert-num2words-pypi-package-shows-signs-of-compromise"
}
],
"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:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "num2words subjected to phishing attack, two versions published containing malware"
}
GHSA-M25Q-FWG4-9V2P
Vulnerability from github – Published: 2020-09-01 19:47 – Updated: 2021-09-24 16:36Version 1.0.2 of awesome_react_utility contained malicious code. The code when executed in the browser would enumerate password, cvc, cardnumber fields from forms and send the extracted values to https://js-metrics.com/minjs.php?pl=
Recommendation
If version 1.0.2 of this module is found installed you will want to replace it with a version before or after 1.0.2. In addition to replacing the installed module, you will also want to evaluate your application to determine whether or not user data was compromised.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "awesome_react_utility"
},
"versions": [
"1.0.2"
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": true,
"github_reviewed_at": "2020-08-31T18:30:05Z",
"nvd_published_at": null,
"severity": "CRITICAL"
},
"details": "Version 1.0.2 of `awesome_react_utility` contained malicious code. The code when executed in the browser would enumerate password, cvc, cardnumber fields from forms and send the extracted values to `https://js-metrics.com/minjs.php?pl=`\n\n\n## Recommendation\n\nIf version 1.0.2 of this module is found installed you will want to replace it with a version before or after 1.0.2. In addition to replacing the installed module, you will also want to evaluate your application to determine whether or not user data was compromised.",
"id": "GHSA-m25q-fwg4-9v2p",
"modified": "2021-09-24T16:36:57Z",
"published": "2020-09-01T19:47:07Z",
"references": [
{
"type": "PACKAGE",
"url": "https://github.com/kooinam/awesome_react_utility"
},
{
"type": "WEB",
"url": "https://www.npmjs.com/advisories/618"
}
],
"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": "Malicious Package in awesome_react_utility"
}
GHSA-M2CX-9W9F-2HM7
Vulnerability from github – Published: 2026-07-30 00:31 – Updated: 2026-07-30 00:31VaahCMS versions 2.0.0 through 2.3.4 contain a malicious obfuscated JavaScript payload embedded in the Blade template responsible for rendering security OTP emails, allowing remote attackers to execute unauthorized code in any browser that renders the affected email template with JavaScript enabled. The payload establishes a WebSocket connection to a hardcoded command-and-control endpoint, installs a password-field keylogger using MutationObserver to capture dynamically added inputs, scrapes WhatsApp Web DOM content, and accepts remote commands to redirect or overwrite the rendered page.
{
"affected": [],
"aliases": [
"CVE-2026-67595"
],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-29T22:16:52Z",
"severity": "CRITICAL"
},
"details": "VaahCMS versions 2.0.0 through 2.3.4 contain a malicious obfuscated JavaScript payload embedded in the Blade template responsible for rendering security OTP emails, allowing remote attackers to execute unauthorized code in any browser that renders the affected email template with JavaScript enabled. The payload establishes a WebSocket connection to a hardcoded command-and-control endpoint, installs a password-field keylogger using MutationObserver to capture dynamically added inputs, scrapes WhatsApp Web DOM content, and accepts remote commands to redirect or overwrite the rendered page.",
"id": "GHSA-m2cx-9w9f-2hm7",
"modified": "2026-07-30T00:31:19Z",
"published": "2026-07-30T00:31:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-67595"
},
{
"type": "WEB",
"url": "https://github.com/webreinvent/vaahcms/pull/317"
},
{
"type": "WEB",
"url": "https://github.com/webreinvent/vaahcms/commit/8d7898f7a385a5fade1180a9b664ff158d873129"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/vaahcms-malicious-javascript-supply-chain-via-security-otp-blade-php"
}
],
"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"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/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-M2FP-C79H-RR79
Vulnerability from github – Published: 2020-09-02 21:42 – Updated: 2021-09-30 21:56All versions of tensorplow contain malicious code as a preinstall script. When installed, the package calls home to a Command and Control server to execute arbitrary commands.
Recommendation
Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer.
The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "tensorplow"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": true,
"github_reviewed_at": "2020-08-31T18:40:13Z",
"nvd_published_at": null,
"severity": "CRITICAL"
},
"details": "All versions of `tensorplow` contain malicious code as a preinstall script. When installed, the package calls home to a Command and Control server to execute arbitrary commands.\n\n\n## Recommendation\n\nAny computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer.\n\nThe package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.",
"id": "GHSA-m2fp-c79h-rr79",
"modified": "2021-09-30T21:56:28Z",
"published": "2020-09-02T21:42:56Z",
"references": [
{
"type": "WEB",
"url": "https://www.npmjs.com/advisories/910"
}
],
"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": "Malicious Package in tensorplow"
}
GHSA-M4FQ-XH7W-JHFM
Vulnerability from github – Published: 2020-09-03 19:39 – Updated: 2021-10-01 21:00All versions of this package contained malware. The package was designed to find and exfiltrate cryptocurrency wallets.
Recommendation
Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer.
The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "crytpo-js"
},
"ranges": [
{
"events": [
{
"introduced": "0.0.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": true,
"github_reviewed_at": "2020-08-31T18:57:34Z",
"nvd_published_at": null,
"severity": "CRITICAL"
},
"details": "All versions of this package contained malware. The package was designed to find and exfiltrate cryptocurrency wallets.\n\n\n## Recommendation\n\nAny computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer.\n\nThe package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.",
"id": "GHSA-m4fq-xh7w-jhfm",
"modified": "2021-10-01T21:00:29Z",
"published": "2020-09-03T19:39:46Z",
"references": [
{
"type": "WEB",
"url": "https://www.npmjs.com/advisories/1391"
}
],
"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:N",
"type": "CVSS_V3"
}
],
"summary": "Malicious Package in crytpo-js"
}
GHSA-M5G8-CX2H-CVRH
Vulnerability from github – Published: 2026-08-21 03:31 – Updated: 2026-08-21 03:31The append-only-vec crate 0.1.9 for Rust can trigger execution of malicious code when compiling a project that uses the crate, because it has a rogue dependency that registers with a command-and-control server to offer arbitrary code execution.
{
"affected": [],
"aliases": [
"CVE-2026-77650"
],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-21T01:17:01Z",
"severity": "CRITICAL"
},
"details": "The append-only-vec crate 0.1.9 for Rust can trigger execution of malicious code when compiling a project that uses the crate, because it has a rogue dependency that registers with a command-and-control server to offer arbitrary code execution.",
"id": "GHSA-m5g8-cx2h-cvrh",
"modified": "2026-08-21T03:31:22Z",
"published": "2026-08-21T03:31:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-77650"
},
{
"type": "WEB",
"url": "https://github.com/rustsec/advisory-db/issues/3161"
},
{
"type": "WEB",
"url": "https://blog.rust-lang.org/2026/08/20/supply-chain-attack-on-arrayref"
},
{
"type": "WEB",
"url": "https://rustsec.org/advisories/RUSTSEC-2026-0262.html"
},
{
"type": "WEB",
"url": "https://safedep.io/arrayref-proc-macro1-rust-build-time-malware"
},
{
"type": "WEB",
"url": "https://www.stepsecurity.io/blog/arrayref-rust-crate-supply-chain-attack"
}
],
"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-M5P4-7WF9-6W99
Vulnerability from github – Published: 2020-09-01 21:10 – Updated: 2021-10-01 13:29All versions of regenrator are considered malicious. The package is malware designed to take advantage of users making a mistake when typing the name of a module to install. When executed, the package calls home to a Command and Control server to execute arbitrary commands.
Recommendation
This package was published to the npm Registry for a very short period of time. If you happen to find it in your environment you should revoke and rotate all credentials found on the compromised machine, as well as completely erase the affected machine and reinstall your Operating System.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "regenrator"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": true,
"github_reviewed_at": "2020-08-31T18:32:43Z",
"nvd_published_at": null,
"severity": "CRITICAL"
},
"details": "All versions of `regenrator` are considered malicious. The package is malware designed to take advantage of users making a mistake when typing the name of a module to install. When executed, the package calls home to a Command and Control server to execute arbitrary commands.\n\n\n## Recommendation\n\nThis package was published to the npm Registry for a very short period of time. If you happen to find it in your environment you should revoke and rotate all credentials found on the compromised machine, as well as completely erase the affected machine and reinstall your Operating System.",
"id": "GHSA-m5p4-7wf9-6w99",
"modified": "2021-10-01T13:29:07Z",
"published": "2020-09-01T21:10:53Z",
"references": [
{
"type": "WEB",
"url": "https://www.npmjs.com/advisories/685"
}
],
"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": "Malicious Package in regenrator"
}
GHSA-M662-56RJ-8FMM
Vulnerability from github – Published: 2025-09-11 14:24 – Updated: 2025-09-11 14:24Impact
Npm users of PUC 1.17.3 or PUC latest were briefly affected by crypto-related malware detailed in the blog post below. This includes the extremely popular jsdelivr hosting of this file.
Patches
We unpublished the version on npm.
Workarounds
This has already been unpublished. See Prebid.js 9 release notes for suggestions on moving off the deprecated workflow of using the PUC or pointing to a dynamic version of it. PUC users pointing to latest should transition to 1.17.2 ASAP to avoid similar attacks in the future.
References
https://www.sonatype.com/blog/npm-chalk-and-debug-packages-hit-in-software-supply-chain-attack
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "prebid-universal-creative"
},
"versions": [
"1.17.3"
]
}
],
"aliases": [
"CVE-2025-59039"
],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": true,
"github_reviewed_at": "2025-09-11T14:24:37Z",
"nvd_published_at": "2025-09-09T23:15:37Z",
"severity": "CRITICAL"
},
"details": "### Impact\nNpm users of PUC 1.17.3 or PUC latest were briefly affected by crypto-related malware detailed in the blog post below. This includes the extremely popular jsdelivr hosting of this file. \n\n### Patches\nWe unpublished the version on npm.\n\n### Workarounds\nThis has already been unpublished. See Prebid.js 9 release notes for suggestions on moving off the deprecated workflow of using the PUC or pointing to a dynamic version of it. PUC users pointing to latest should transition to 1.17.2 ASAP to avoid similar attacks in the future.\n\n### References\nhttps://www.sonatype.com/blog/npm-chalk-and-debug-packages-hit-in-software-supply-chain-attack",
"id": "GHSA-m662-56rj-8fmm",
"modified": "2025-09-11T14:24:37Z",
"published": "2025-09-11T14:24:37Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/prebid/prebid-universal-creative/security/advisories/GHSA-m662-56rj-8fmm"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-59039"
},
{
"type": "PACKAGE",
"url": "https://github.com/prebid/prebid-universal-creative"
},
{
"type": "WEB",
"url": "https://www.sonatype.com/blog/npm-chalk-and-debug-packages-hit-in-software-supply-chain-attack"
}
],
"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:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Prebid-universal-creative latest on npm briefly compromised"
}
GHSA-M6Q2-9PFM-2WVR
Vulnerability from github – Published: 2020-09-03 17:02 – Updated: 2021-10-04 15:56All versions of this package contained malware. The package was designed to find and exfiltrate cryptocurrency wallets.
Recommendation
Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer.
The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "wallet-address-vaildator"
},
"ranges": [
{
"events": [
{
"introduced": "0.0.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": true,
"github_reviewed_at": "2020-08-31T18:58:23Z",
"nvd_published_at": null,
"severity": "CRITICAL"
},
"details": "All versions of this package contained malware. The package was designed to find and exfiltrate cryptocurrency wallets.\n\n\n## Recommendation\n\nAny computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer.\n\nThe package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.",
"id": "GHSA-m6q2-9pfm-2wvr",
"modified": "2021-10-04T15:56:06Z",
"published": "2020-09-03T17:02:49Z",
"references": [
{
"type": "WEB",
"url": "https://www.npmjs.com/advisories/1412"
}
],
"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:N",
"type": "CVSS_V3"
}
],
"summary": "Malicious Package in wallet-address-vaildator"
}
Mitigation
Remove the malicious code and start an effort to ensure that no more malicious code exists. This may require a detailed review of all code, as it is possible to hide a serious attack in only one or two lines of code. These lines may be located almost anywhere in an application and may have been intentionally obfuscated by the attacker.
CAPEC-442: Infected Software
An adversary adds malicious logic, often in the form of a computer virus, to otherwise benign software. This logic is often hidden from the user of the software and works behind the scenes to achieve negative impacts. Many times, the malicious logic is inserted into empty space between legitimate code, and is then called when the software is executed. This pattern of attack focuses on software already fielded and used in operation as opposed to software that is still under development and part of the supply chain.
CAPEC-448: Embed Virus into DLL
An adversary tampers with a DLL and embeds a computer virus into gaps between legitimate machine instructions. These gaps may be the result of compiler optimizations that pad memory blocks for performance gains. The embedded virus then attempts to infect any machine which interfaces with the product, and possibly steal private data or eavesdrop.
CAPEC-636: Hiding Malicious Data or Code within Files
Files on various operating systems can have a complex format which allows for the storage of other data, in addition to its contents. Often this is metadata about the file, such as a cached thumbnail for an image file. Unless utilities are invoked in a particular way, this data is not visible during the normal use of the file. It is possible for an attacker to store malicious data or code using these facilities, which would be difficult to discover.