Common Weakness Enumeration
CWE-1289
AllowedImproper Validation of Unsafe Equivalence in Input
Abstraction: Base · Status: Incomplete
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.
55 vulnerabilities reference this CWE, most recent first.
CVE-2026-41239 (GCVE-0-2026-41239)
Vulnerability from cvelistv5 – Published: 2026-04-23 14:47 – Updated: 2026-04-25 01:21
VLAI
EPSS
VEX
Title
DOMPurify has a SAFE_FOR_TEMPLATES bypass in RETURN_DOM mode
Summary
DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Starting in version 1.0.10 and prior to version 3.4.0, `SAFE_FOR_TEMPLATES` strips `{{...}}` expressions from untrusted HTML. This works in string mode but not with `RETURN_DOM` or `RETURN_DOM_FRAGMENT`, allowing XSS via template-evaluating frameworks like Vue 2. Version 3.4.0 patches the issue.
Severity
6.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-25 01:21 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | x_refsource_CONFIRM |
| https://github.com/cure53/DOMPurify/releases/tag/3.4.0 | x_refsource_MISC |
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CVE-2026-41213 (GCVE-0-2026-41213)
Vulnerability from cvelistv5 – Published: 2026-04-23 18:33 – Updated: 2026-04-25 01:23
VLAI
EPSS
VEX
Title
@node-oauth/oauth2-server: PKCE code_verifier ABNF not enforced in token exchange allows brute-force redemption of intercepted authorization codes
Summary
@node-oauth/oauth2-server is a module for implementing an OAuth2 server in Node.js. The token exchange path accepts RFC7636-invalid code_verifier values (including one-character strings) for S256 PKCE flows. Because short/weak verifiers are accepted and failed verifier attempts do not consume the authorization code, an attacker who intercepts an authorization code can brute-force code_verifier guesses online until token issuance succeeds.
Severity
5.9 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-25 01:23 UTC
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/node-oauth/node-oauth2-server/… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| node-oauth | node-oauth2-server |
Affected:
< 5.3.0
|
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CVE-2026-39972 (GCVE-0-2026-39972)
Vulnerability from cvelistv5 – Published: 2026-04-09 16:42 – Updated: 2026-04-09 18:59
VLAI
EPSS
VEX
Title
Mercure has a Topic Selector Cache Key Collision
Summary
Mercure is a protocol for pushing data updates to web browsers and other HTTP clients in a battery-efficient way. Prior to 0.22.0, a cache key collision vulnerability in TopicSelectorStore allows an attacker to poison the match result cache, potentially causing private updates to be delivered to unauthorized subscribers or blocking delivery to authorized ones. The cache key was constructed by concatenating the topic selector and topic with an underscore separator. Because both topic selectors and topics can contain underscores, two distinct pairs can produce the same key. An attacker who can subscribe to the hub or publish updates with crafted topic names can exploit this to bypass authorization checks on private updates. This vulnerability is fixed in 0.22.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-09 18:59 UTC
CWE
- CWE-1289 - Improper Validation of Unsafe Equivalence in Input
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/dunglas/mercure/security/advis… | x_refsource_CONFIRM |
| https://github.com/dunglas/mercure/commit/4964a69… | x_refsource_MISC |
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CVE-2026-35039 (GCVE-0-2026-35039)
Vulnerability from cvelistv5 – Published: 2026-04-06 16:59 – Updated: 2026-05-13 15:12
VLAI
EPSS
VEX
Title
fast-jwt Affected by Cache Confusion via cacheKeyBuilder Collisions Can Return Claims From a Different Token (Identity/Authorization Mixup)
Summary
fast-jwt provides fast JSON Web Token (JWT) implementation. From 0.0.1 to before 6.2.0, setting up a custom cacheKeyBuilder method which does not properly create unique keys for different tokens can lead to cache collisions. This could cause tokens to be mis-identified during the verification process leading to valid tokens returning claims from different valid tokens and users being mis-identified as other users based on the wrong token. Version 6.2.0 contains a patch.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-07 14:25 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/nearform/fast-jwt/security/adv… | x_refsource_CONFIRM |
| https://github.com/nearform/fast-jwt/commit/de121… | x_refsource_MISC |
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CVE-2026-34080 (GCVE-0-2026-34080)
Vulnerability from cvelistv5 – Published: 2026-04-07 20:57 – Updated: 2026-04-21 12:21
VLAI
EPSS
VEX
Title
xdg-dbus-proxy has an eavesdrop filter bypass allowing message interception
Summary
xdg-dbus-proxy is a filtering proxy for D-Bus connections. Prior to 0.1.7, a policy parser vulnerability allows bypassing eavesdrop restrictions. The proxy checks for eavesdrop=true in policy rules but fails to handle eavesdrop ='true' (with a space before the equals sign) and similar cases. Clients can intercept D-Bus messages they should not have access to. This vulnerability is fixed in 0.1.7.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-08 15:40 UTC
CWE
- CWE-1289 - Improper Validation of Unsafe Equivalence in Input
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| flatpak | xdg-dbus-proxy |
Affected:
< 0.1.7
|
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CVE-2026-33729 (GCVE-0-2026-33729)
Vulnerability from cvelistv5 – Published: 2026-03-27 00:27 – Updated: 2026-03-30 11:53
VLAI
EPSS
VEX
Title
OpenFGA has an Authorization Bypass through cached keys
Summary
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 check requests producing the same cache key. This can result in OpenFGA reusing an earlier cached result for a different request. Users are affected if the model has relations which rely on condition evaluation andncaching is enabled. OpenFGA v1.13.1 contains a patch.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-30 11:52 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/openfga/openfga/security/advis… | x_refsource_CONFIRM |
| https://github.com/openfga/openfga/commit/049b50c… | x_refsource_MISC |
| https://github.com/openfga/openfga/releases/tag/v1.13.1 | x_refsource_MISC |
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CVE-2026-33515 (GCVE-0-2026-33515)
Vulnerability from cvelistv5 – Published: 2026-03-26 00:13 – Updated: 2026-03-26 14:19
VLAI
EPSS
VEX
Title
Squid has issues in ICP message handling
Summary
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 sensitive information when responding with errors to invalid ICP requests. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero `icp_port`). This problem cannot be mitigated by denying ICP queries using `icp_access` rules. Version 7.5 contains a patch.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-26 14:19 UTC
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/squid-cache/squid/security/adv… | x_refsource_CONFIRM |
| https://github.com/squid-cache/squid/pull/2220 | x_refsource_MISC |
| https://github.com/squid-cache/squid/pull/2220#di… | x_refsource_MISC |
| https://github.com/squid-cache/squid/commit/8138e… | x_refsource_MISC |
| http://www.openwall.com/lists/oss-security/2026/03/25/4 |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
< 7.5
|
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CVE-2026-33496 (GCVE-0-2026-33496)
Vulnerability from cvelistv5 – Published: 2026-03-26 17:29 – Updated: 2026-03-30 11:20
VLAI
EPSS
VEX
Title
Ory Oathkeeper has an authentication bypass by cache key confusion
Summary
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_introspection` authenticator cache does not distinguish tokens that were validated with different introspection URLs. An attacker can therefore legitimately use a token to prime the cache, and subsequently use the same token for rules that use a different introspection server. Ory Oathkeeper has to be configured with multiple `oauth2_introspection` authenticator servers, each accepting different tokens. The authenticators also must be configured to use caching. An attacker has to have a way to gain a valid token for one of the configured introspection servers. Starting in version 26.2.0, Ory Oathkeeper includes the introspection server URL in the cache key, preventing confusion of tokens. Update to the patched version of Ory Oathkeeper. If that is not immediately possible, disable caching for `oauth2_introspection` authenticators.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-30 11:19 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/ory/oathkeeper/security/adviso… | x_refsource_CONFIRM |
| https://github.com/ory/oathkeeper/commit/198a2bc8… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ory | oathkeeper |
Affected:
< 26.2.0
|
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CVE-2026-27610 (GCVE-0-2026-27610)
Vulnerability from cvelistv5 – Published: 2026-02-25 02:19 – Updated: 2026-02-27 17:24
VLAI
EPSS
VEX
Title
Parse Dashboard Has a Cache Key Collision that Leaks Master Key to Read-Only Sessions
Summary
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 specific timing conditions, a read-only user can receive the cached full master key, or a regular user can receive the cached read-only master key. The fix in version 9.0.0-alpha.8 uses distinct cache keys for master key and read-only master key. As a workaround, avoid using function-typed master keys, or remove the `agent` configuration block from your dashboard configuration.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-27 17:24 UTC
CWE
- CWE-1289 - Improper Validation of Unsafe Equivalence in Input
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/parse-community/parse-dashboar… | x_refsource_CONFIRM |
| https://github.com/parse-community/parse-dashboar… | x_refsource_MISC |
| https://github.com/parse-community/parse-dashboar… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| parse-community | parse-dashboard |
Affected:
>= 7.3.0-alpha.42, < 9.0.0-alpha.8
|
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CVE-2026-22569 (GCVE-0-2026-22569)
Vulnerability from cvelistv5 – Published: 2026-03-31 14:54 – Updated: 2026-03-31 17:24
VLAI
EPSS
VEX
Title
Incorrect startup configuration in ZCC
Summary
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.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-31 17:24 UTC
CWE
- CWE-1289 - Improper validation of unsafe equivalence in input
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zscaler | Zscaler Client Connector |
Affected:
4.7 , < 4.7.0.141
(custom)
Affected: 4.8 , < 4.8.0.63 (custom) |
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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.
No CAPEC attack patterns related to this CWE.