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Home/CWEs/CWE-177
Common Weakness Enumeration

CWE-177: Improper Handling of URL Encoding (Hex Encoding)

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The product does not properly handle when all or part of an input has been URL encoded.

Abstraction
Variant
Related CVEs
10

▪ References & documentation

https://cwe.mitre.org/data/definitions/177.htmlNVD CWE listing

▪ How attackers exploit CWE-177

MITRE ATT&CK techniques associated with this weakness class (mapped via MITRE CAPEC). A vulnerability of this type could let an adversary carry out:

T1027Obfuscated Files or Informationstealth

▪ Related CVEs

CVE-2026-76172High

Security vulnerability in fast-uri

CVE-2026-76172High

Security vulnerability in fast-uri

CVE-2026-76172High

Security vulnerability in fast-uri

CVE-2026-76172High

Security vulnerability in fast-uri

CVE-2026-76172High

Security vulnerability in fast-uri

CVE-2026-29045High

Security vulnerability in hono

CVE-2026-76172High

Security vulnerability in fast-uri

CVE-2026-76172High

Security vulnerability in fast-uri

CVE-2022-27780High

Security vulnerability in curl

GHSA-jqff-g426-hqxpHigh

Security vulnerability in fast-uri