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CWE-22 (对路径名的限制不恰当(路径遍历)) — Vulnerability Class 5186

5186 vulnerabilities classified as CWE-22 (对路径名的限制不恰当(路径遍历)). AI Chinese analysis included.

CWE-22 represents a critical input validation weakness where software fails to properly sanitize external input before constructing file paths. Attackers typically exploit this vulnerability by injecting directory traversal sequences, such as “../”, into user-supplied parameters. These malicious inputs allow the application to resolve file references outside the intended restricted directory, potentially granting unauthorized access to sensitive system files, configuration data, or source code. To mitigate this risk, developers must implement rigorous input validation techniques, ensuring that all path components are strictly checked against allowed characters and structures. Additionally, employing canonicalization to resolve symbolic links and relative paths before validation, combined with strict chroot jails or sandboxing, effectively confines file operations to designated directories, thereby neutralizing the potential for path traversal attacks and preserving system integrity.

MITRE CWE Description
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Many file operations are intended to take place within a restricted directory. By using special elements such as ".." and "/" separators, attackers can escape outside of the restricted location to access files or directories that are elsewhere on the system. One of the most common special elements is the "../" sequence, which in most modern operating systems is interpreted as the parent directory of the current location. This is referred to as relative path traversal. Path traversal also covers the use of absolute pathnames such as "/usr/local/bin" to access unexpected files. This is referred to as absolute path traversal.
Common Consequences (4)
Integrity, Confidentiality, Availability Execute Unauthorized Code or Commands
The attacker may be able to create or overwrite critical files that are used to execute code, such as programs or libraries.
Integrity Modify Files or Directories
The attacker may be able to overwrite or create critical files, such as programs, libraries, or important data. If the targeted file is used for a security mechanism, then the attacker may be able to bypass that mechanism. For example, appending a new account at the end of a password file may allow …
Confidentiality Read Files or Directories
The attacker may be able read the contents of unexpected files and expose sensitive data. If the targeted file is used for a security mechanism, then the attacker may be able to bypass that mechanism. For example, by reading a password file, the attacker could conduct brute force password guessing a…
Availability DoS: Crash, Exit, or Restart
The attacker may be able to overwrite, delete, or corrupt unexpected critical files such as programs, libraries, or important data. This may prevent the product from working at all and in the case of protection mechanisms such as authentication, it has the potential to lock out product users.
Mitigations (5)
Implementation Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does. When performing input validation, consider all potentially relevant properties, including length, type of input, the full range…
Architecture and Design For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
Implementation Inputs should be decoded and canonicalized to the application's current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174). Such errors could be used to bypass allowlist validation schemes by introducing dangerous inputs after they have been checked. Use a built-in path canonicalization function (such as realpath(…
Architecture and Design Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid [REF-1482].
Operation 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].
Effectiveness: Moderate
Examples (2)
The following code could be for a social networking application in which each user's profile information is stored in a separate file. All files are stored in a single directory.
my $dataPath = "/users/cwe/profiles"; my $username = param("user"); my $profilePath = $dataPath . "/" . $username; open(my $fh, "<", $profilePath) || ExitError("profile read error: $profilePath"); print "<ul>\n"; while (<$fh>) { print "<li>$_</li>\n"; } print "</ul>\n";
Bad · Perl
../../../etc/passwd
Attack
In the example below, the path to a dictionary file is read from a system property and used to initialize a File object.
String filename = System.getProperty("com.domain.application.dictionaryFile"); File dictionaryFile = new File(filename);
Bad · Java
CVE ID Title CVSS Severity Published
CVE-2026-80155 Lantronix Autonomous Out-of-Band Devices Unauthenticated Authentication Bypass via snprintf Path Truncation — SLC8000 10.0 Critical 2026-09-22
CVE-2026-77621 Vector: Arbitrary file write in the file sink via templated path (path traversal). — vector 9.3 Critical 2026-09-22
CVE-2026-95701 MISP Path Traversal via Organization Name in Org-Statistics Logo Check — MISP 5.1 Medium 2026-09-22
CVE-2026-95698 MISP Path Traversal in OrgImgHelper findOrgImage via Crafted Organization Name — MISP 5.3 Medium 2026-09-22
CVE-2026-93616 Directory Traversal and File upload allows execution of arbitrary script on the Management Server — Quantum Security Management 9.8 Critical 2026-09-22
CVE-2026-95273 dgtlmoon changedetection.io visual_selector_data flask_app.py static_content path traversal — changedetection.io 4.3 Medium 2026-09-22
CVE-2026-95272 dgtlmoon changedetection.io Screenshot flask_app.py static_content path traversal — changedetection.io 3.7 Low 2026-09-22
CVE-2026-15095 Product Feed Manager for WooCommerce <= 6.6.43 - Authenticated (Shop Manager+) Path Traversal to File Deletion via 'provider' Parameter — Product Feed Manager for WooCommerce – CTX Feed – Support 220+ Shopping, AI & Social Channels 4.9 Medium 2026-09-22
CVE-2025-1280 BM Content Builder < 3.17.1 - Authenticated (Subscriber+) Arbitrary File Read — BM Content Builder 6.5 Medium 2026-09-22
CVE-2025-1281 BM Content Builder < 3.17.1 - Authenticated (Subscriber+) Arbitrary File Deletion — BM Content Builder 8.8 High 2026-09-22
CVE-2026-93712 Dancer2 versions from 2.1.0 before 2.2.0 for Perl serve files from outside public_dir via relative path segments in the File route handler - - 2026-09-22
CVE-2026-61647 @roomi-fields/notebooklm-mcp has path traversal in vault.batch tool that allows arbitrary file write outside intended vault directory — notebooklm-mcp 7.1 High 2026-09-21
CVE-2026-59816 Joplin: Path traversal in transcribe proxy endpoint via URL-encoded slash — joplin 4.3 Medium 2026-09-21
CVE-2026-52835 Tautulli: Path traversal / arbitrary file write via unsanitized upload filename in import_config and import_database — Tautulli 7.0 High 2026-09-21
CVE-2026-62369 KubeEdge: keadm DecompressTarGz path traversal enables arbitrary file write on Windows during edge node join — kubeedge 8.1 High 2026-09-21
CVE-2026-63416 draw.io: Path traversal in ExportProxyServlet allows access to arbitrary backend endpoints — drawio 3.7 Low 2026-09-21
CVE-2026-53940 Conda: Entry-point path traversal in noarch:python install (arbitrary file write) — canonical Python implementation — conda 8.8 High 2026-09-21
CVE-2026-15801 Cri-o: cri-o: insufficient validation during container checkpoint restore — Red Hat OpenShift Container Platform 4 8.0 High 2026-09-21
CVE-2026-94185 nvm alias resolution follows `..` and discloses files outside $NVM_DIR/alias — nvm 5.5 Medium 2026-09-21
CVE-2026-94049 06ketan slideshot renderer.ts render_slides path traversal — slideshot 4.3 Medium 2026-09-20
CVE-2026-94046 0215AndrewFeng ACE-MCP MCP Tool getFileSnippet.ts get_file_snippet path traversal — ACE-MCP 4.3 Medium 2026-09-20
CVE-2026-94044 03-lovepreetSingh MCP route.ts create_file path traversal — MCP 7.3 High 2026-09-20
CVE-2026-94037 00Kisumi00 mcp-file-analyzer analyze_csv_data MCP tool main.py ControlFlowNode path traversal — mcp-file-analyzer 4.3 Medium 2026-09-20
CVE-2026-93992 Gopeed through 2.0.0-beta.3 Arbitrary File Write via Path Traversal — gopeed 8.1 High 2026-09-19
CVE-2026-93988 QloApps through 1.7.0 Arbitrary File Read via getEmailHTML — qloapps 6.5 Medium 2026-09-19
CVE-2026-93986 rclone before 1.75.1 Path Traversal via Directory Listing Names — rclone 3.1 Low 2026-09-19
CVE-2026-85272 Open edX Platform: Path traversal via prefix-bypass in safe_extractall Path Validation — openedx-platform 4.3 Medium 2026-09-18
CVE-2026-84086 IBM Guardium Data Protection is affected by multiple vulnerabilities. — Guardium Data Protection 7.2 High 2026-09-18
CVE-2026-82896 IBM Guardium Data Protection is affected by multiple vulnerabilities. — Guardium Data Protection 7.6 High 2026-09-18
CVE-2017-20284 Caucho Resin resin-doc Unauthenticated Path Traversal via jndi-appconfig Servlet — Resin 7.5 High 2026-09-18

Vulnerabilities classified as CWE-22 (对路径名的限制不恰当(路径遍历)) represent 5186 CVEs. The CWE taxonomy describes the weakness; review individual CVEs for product-specific impact.