CWE-175
Weakness AllowedImproper Handling of Mixed Encoding
Abstraction: Variant · Status: Draft
The product does not properly handle when the same input uses several different (mixed) encodings.
Mapping guidance
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Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.
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2 vulnerabilities reference this CWE, most recent first.
CVE-2026-82162 (GCVE-0-2026-82162)
Vulnerability from cvelistv5 – Published: 2026-10-06 18:49 – Updated: 2026-10-06 19:47- CWE-175 - Improper Handling of Mixed Encoding
| URL | Tags |
|---|---|
| https://www.dell.com/support/kbdoc/en-us/00050247… | vendor-advisory |
| Vendor | Product | Version | |
|---|---|---|---|
| Dell | Command | Configure (DCC) |
Affected:
0 , < 5.2.3.35
(semver)
|
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GHSA-PXW5-P7PC-MFVJ
Vulnerability from github – Published: 2026-10-06 21:31 – Updated: 2026-10-06 21:31Dell Command | Configure (DCC), versions prior to 5.2.3.35, contain an Improper Handling of Mixed Encoding vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to Elevation of Privileges.
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Mitigation MIT-44
Strategy: Input Validation
Avoid making decisions based on names of resources (e.g. files) if those resources can have alternate names.
Mitigation MIT-5
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-30
Strategy: Output Encoding
Use and specify an output encoding that can be handled by the downstream component that is reading the output. Common encodings include ISO-8859-1, UTF-7, and UTF-8. When an encoding is not specified, a downstream component may choose a different encoding, either by assuming a default encoding or automatically inferring which encoding is being used, which can be erroneous. When the encodings are inconsistent, the downstream component might treat some character or byte sequences as special, even if they are not special in the original encoding. Attackers might then be able to exploit this discrepancy and conduct injection attacks; they even might be able to bypass protection mechanisms that assume the original encoding is also being used by the downstream component.
Mitigation MIT-20
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.