toy-blog Improper Input Validation vulnerability
Description
In toy-blog 0.5.4 through 0.6.0, private articles are readable without authentication due to a missing credential check. Upgrade to 0.6.1 to fix.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
In toy-blog 0.5.4 through 0.6.0, private articles are readable without authentication due to a missing credential check. Upgrade to 0.6.1 to fix.
Vulnerability
In toy-blog versions 0.5.4 to 0.6.0, the GET /article/{id} endpoint fails to properly enforce authentication for articles with Visibility::Private. The authorization logic incorrectly allows access when no bearer token is provided, bypassing the intended check. The vulnerability was introduced in version 0.5.4 and fixed in 0.6.1 [1][2].
Exploitation
An unauthenticated attacker can retrieve any private article simply by sending a GET request to /article/{id} without including an Authorization header. No special privileges, user interaction, or network position is required beyond access to the API endpoint [1].
Impact
Successful exploitation leads to unauthorized disclosure of private article content, compromising confidentiality. The attacker gains read access to data that should be restricted to authenticated users. Integrity and availability are not affected [1].
Mitigation
Upgrade to toy-blog version 0.6.1 or later, which includes the commit that corrects the authorization check [1][2]. No workarounds are available; users must update to patch the vulnerability.
AI Insight generated on May 27, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
2>=0.5.4 <0.6.1+ 1 more
- (no CPE)range: >=0.5.4 <0.6.1
- (no CPE)range: >= 0.5.4, < 0.6.1
Patches
1f13a45f68c95Vulnerability mechanics
Root cause
"The application incorrectly allows access to private articles when no authentication token is provided."
Attack vector
An unauthenticated attacker can read private articles by making a request to the `/article/{id}` endpoint without providing any credentials. The vulnerability exists because the application does not properly check for the presence of an authentication token when the article's visibility is set to private. This allows unauthorized users to bypass the intended access controls. [ref_id=1]
Affected code
The vulnerability lies within the `fetch` function in the `packages/toy-blog/src/service/rest` file. Specifically, the conditional logic that checks for article visibility and authentication has been modified to correctly enforce access controls for private articles. [patch_id=165826]
What the fix does
The patch modifies the logic for handling private articles. Previously, if an article was private and an authentication token was provided, it would check if the token was valid. The fix changes this to check if the article visibility is private, and if so, it requires a valid authentication token to be present. If no token is provided (i.e., `auth` is `None`), the condition `auth.map_or(true, ...)` evaluates to true, correctly preventing access. [patch_id=165826]
Preconditions
- configAn article with private visibility must exist in the toy-blog instance.
- inputThe attacker must know or guess the ID of a private article.
Generated on Jun 1, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.
References
2- github.com/KisaragiEffective/toy-blog/commit/f13a45f68c9560124558e6bb445ad441a4cf4732mitrex_refsource_MISC
- github.com/KisaragiEffective/toy-blog/security/advisories/GHSA-rf2q-5q4q-5fwrmitrex_refsource_CONFIRM
News mentions
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