Common Weakness Enumeration

CWE-145

Allowed

Improper Neutralization of Section Delimiters

Abstraction: Variant · Status: Incomplete

API response cwe.mitre.org

The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as section delimiters when they are sent to a downstream component.

2 vulnerabilities reference this CWE, most recent first.

CVE-2011-10043 (GCVE-0-2011-10043)

Vulnerability from cvelistv5 – Published: 2026-07-07 11:46 – Updated: 2026-07-07 16:04
VLAI
Title
Module::Load versions before 0.22 for Perl allow arbitrary modules outside of @INC to be loaded
Summary
Module::Load versions before 0.22 for Perl allow arbitrary modules outside of @INC to be loaded. Module names starting with "::" could be passed to the load function to specify arbitrary module paths. Attackers able to influence module names passed to load could use that bug to execute arbitrary code.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-145 - Improper Neutralization of Section Delimiters
Assigner
References
Impacted products
Vendor Product Version
BINGOS Module::Load Affected: 0 , < 0.22 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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          "time": "2011-10-02T00:00:00.000Z",
          "value": "General issue identified by Michael G Schwern in blog post."
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          "lang": "en",
          "time": "2011-10-04T00:00:00.000Z",
          "value": "Module::Load 0.22 released."
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        {
          "lang": "en",
          "time": "2011-10-20T00:00:00.000Z",
          "value": "Perl v5.15.4 released with Module::Load 0.22."
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      "title": "Module::Load versions before 0.22 for Perl allow arbitrary modules outside of @INC to be loaded",
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GHSA-8X3H-9QCG-HV3J

Vulnerability from github – Published: 2026-07-07 12:31 – Updated: 2026-07-07 18:30
VLAI
Details

Module::Load versions before 0.22 for Perl allow arbitrary modules outside of @INC to be loaded.

Module names starting with "::" could be passed to the load function to specify arbitrary module paths.

Attackers able to influence module names passed to load could use that bug to execute arbitrary code.

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2011-10043"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-145"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-07T12:16:24Z",
    "severity": "CRITICAL"
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  "details": "Module::Load versions before 0.22 for Perl allow arbitrary modules outside of @INC to be loaded.\n\nModule names starting with \"::\" could be passed to the load function to specify arbitrary module paths.\n\nAttackers able to influence module names passed to load could use that bug to execute arbitrary code.",
  "id": "GHSA-8x3h-9qcg-hv3j",
  "modified": "2026-07-07T18:30:41Z",
  "published": "2026-07-07T12:31:36Z",
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    },
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  "severity": [
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      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}
Mitigation

Developers should anticipate that section delimiters will be injected/removed/manipulated in the input vectors of their product. Use an appropriate combination of denylists and allowlists to ensure only valid, expected and appropriate input is processed by the system.

Mitigation MIT-5
Implementation

Strategy: Input Validation

  • 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 of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
  • Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
Mitigation MIT-28
Implementation

Strategy: Output Encoding

While it is risky to use dynamically-generated query strings, code, or commands that mix control and data together, sometimes it may be unavoidable. Properly quote arguments and escape any special characters within those arguments. The most conservative approach is to escape or filter all characters that do not pass an extremely strict allowlist (such as everything that is not alphanumeric or white space). If some special characters are still needed, such as white space, wrap each argument in quotes after the escaping/filtering step. Be careful of argument injection (CWE-88).

Mitigation MIT-20
Implementation

Strategy: Input Validation

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.

No CAPEC attack patterns related to this CWE.

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