Weakness (CWE)
CWE-1289: Improper Validation of Unsafe Equivalence in Input
The product receives an input value that is used as a resource identifier or other type of reference, but it does not validate or incorrectly validates that the input is equivalent to a potentially-unsafe value.
How to prevent it (1 mitigation)
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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 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.
Source: MITRE CWE-1289
54 results · Feed
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Medium 5.4
Incorrect startup configuration in ZCC
An incorrect startup configuration of affected versions of Zscaler Client Connector on Windows may cause a limited amount of traffic from being inspected under rare circumstances.
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Medium 5.8
OpenFGA has an Authorization Bypass through cached keys
OpenFGA is a high-performance and flexible authorization/permission engine built for developers and inspired by Google Zanzibar. In versions prior to 1.13.1, under specific conditions, models using conditions with caching enabled can result in two different c…
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High 8.1
Ory Oathkeeper has an authentication bypass by cache key confusion
ORY Oathkeeper is an Identity & Access Proxy (IAP) and Access Control Decision API that authorizes HTTP requests based on sets of Access Rules. Versions prior to 26.2.0 are vulnerable to authentication bypass due to cache key confusion. The `oauth2_introspect…
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Medium 6.9
Squid has issues in ICP message handling
Squid is a caching proxy for the Web. Prior to version 7.5, due to improper input validation, Squid is vulnerable to out of bounds read when handling ICP traffic. This problem allows a remote attacker to receive small amounts of memory potentially containing …
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Medium 5.5
Improper input validation in the apps and endpoints configuration in PowerShell Universal before 2026.1.4 allows an aut…
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High 7.0
Parse Dashboard Has a Cache Key Collision that Leaks Master Key to Read-Only Sessions
Parse Dashboard is a standalone dashboard for managing Parse Server apps. In versions 7.3.0-alpha.42 through 9.0.0-alpha.7, the `ConfigKeyCache` uses the same cache key for both master key and read-only master key when resolving function-typed keys. Under spe…
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Medium 4.6
Improper Validation of Unsafe Equivalence in Input in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.8 before 18.8.4 that could have allowed an authenticated developer to hide specially crafted file changes from the WebUI.
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Medium 5.1
idna accepts Punycode labels that do not produce any non-ASCII when decoded
Improper Validation of Unsafe Equivalence in punycode by the idna crate from Servo rust-url allows an attacker to create a punycode hostname that one part of a system might treat as distinct while another part of that system would treat as equivalent to anoth…
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High 7.2
An issue was discovered in za-internet C-MOR Video Surveillance 5.2401 and 6.00PL01. Due to insufficient input validati…
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Medium 4.8
AngularJS improper sanitization in 'srcset' attribute
Improper sanitization of the value of the 'srcset' attribute in AngularJS allows attackers to bypass common image source restrictions, which can also lead to a form of Content Spoofing https://owasp.org/www-community/attacks/Content_Spoofing . This issue affe…
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Medium 6.5
MySQL & free URL mode allows to hide existing notes in hedgedoc
HedgeDoc is an open source, real-time, collaborative, markdown notes application. When using HedgeDoc 1 with MySQL or MariaDB, it is possible to create notes with an alias matching the ID of existing notes. The affected existing note can then not be accessed …
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High 7.0
1Password 8 before 8.10.36 for macOS allows local attackers to exfiltrate vault items because XPC inter-process communi…
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Medium 6.3
1Password 8 before 8.10.38 for macOS allows local attackers to exfiltrate vault items by bypassing macOS-specific secur…
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Medium 5.6
Puppet Firewall Module May Leave Unmanaged Rules
In certain situations it is possible for an unmanaged rule to exist on the target system that has the same comment as the rule specified in the manifest. This could allow for unmanaged rules to exist on the target system and leave the system in an unsafe stat…