How severe is GHSA-94w9-97p3-p368?

GHSA-94w9-97p3-p368 has a CVSS score of 9.6/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by GHSA-94w9-97p3-p368?

GHSA-94w9-97p3-p368 affects the following packages: github.com/gofiber/fiber/v2 (Go). Ecosystems affected: Go.

How do I fix GHSA-94w9-97p3-p368?

Update github.com/gofiber/fiber/v2 to 2.50.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-94w9-97p3-p368 is resolved across your whole dependency graph.

How do I detect GHSA-94w9-97p3-p368 in my Go dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/gofiber/fiber/v2. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

How do I mitigate GHSA-94w9-97p3-p368 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against GHSA-94w9-97p3-p368?

O3 pinpoints whether GHSA-94w9-97p3-p368 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Is GHSA-94w9-97p3-p368 actively exploited in the wild?

No public exploit code has been indexed for GHSA-94w9-97p3-p368 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for GHSA-94w9-97p3-p368?

GHSA-94w9-97p3-p368 has an EPSS (Exploit Prediction Scoring System) score of 0.3%, placing it in the 23th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is GHSA-94w9-97p3-p368?

GHSA-94w9-97p3-p368 is classified as Improper Input Validation (CWE-20), Cross-Site Request Forgery (CSRF) (CWE-352), CWE-565 (CWE-565), CWE-807 (CWE-807). These weakness types describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was GHSA-94w9-97p3-p368 published, and has it been updated?

GHSA-94w9-97p3-p368 was published on October 17, 2023 and was last updated on November 8, 2023. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

GHSA-94w9-97p3-p368: CSRF Token Reuse Vulnerability (Critical 9…

EPSS Exploitation Probability

via FIRST.org ↗

0.3%probability of exploitation in next 30 days

Lower Risk23th percentile+0.16%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Blast Radius

1 pkg affected

🐹github.com/gofiber/fiber/v2

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

A Cross-Site Request Forgery (CSRF) vulnerability has been identified in the application, which allows an attacker to inject arbitrary values and forge malicious requests on behalf of a user. This vulnerability can allow an attacker to inject arbitrary values without any authentication, or perform various malicious actions on behalf of an authenticated user, potentially compromising the security and integrity of the application.

Vulnerability Details

The vulnerability is caused by improper validation and enforcement of CSRF tokens within the application. The following issues were identified:

Token Injection: For 'safe' methods, the token was extracted from the cookie and saved to storage without further validation or sanitization.
Lack of Token Association: The CSRF token was validated against tokens in storage but not associated with a session, nor by using a Double Submit Cookie Method, allowing for token reuse.

Specific Go Packages Affected

github.com/gofiber/fiber/v2/middleware/csrf

Remediation

To remediate this vulnerability, it is recommended to take the following actions:

Update the Application: Upgrade the application to a fixed version with a patch for the vulnerability.
Implement Proper CSRF Protection: Review the updated documentation and ensure your application's CSRF protection mechanisms follow best practices.
Choose CSRF Protection Method: Select the appropriate CSRF protection method based on your application's requirements, either the Double Submit Cookie method or the Synchronizer Token Pattern using sessions.
Security Testing: Conduct a thorough security assessment, including penetration testing, to identify and address any other security vulnerabilities.

Defence-in-depth

Users should take additional security measures like captchas or Two-Factor Authentication (2FA) and set Session cookies with SameSite=Lax or SameSite=Secure, and the Secure and HttpOnly attributes.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐹Go	`github.com/gofiber/fiber/v2`	all versions	2.50.0

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/gofiber/fiber/v2. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update github.com/gofiber/fiber/v2 to 2.50.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-94w9-97p3-p368 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-94w9-97p3-p368 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-94w9-97p3-p368. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

A Cross-Site Request Forgery (CSRF) vulnerability has been identified in the application, which allows an attacker to inject arbitrary values and forge malicious requests on behalf of a user. This vulnerability can allow an attacker to inject arbitrary values without any authentication, or perform various malicious actions on behalf of an authenticated user, potentially compromising the security and integrity of the application. ## Vulnerability Details The vulnerability is caused by improper validation and enforcement of CSRF tokens within the application. The following issues were identifi

O3 Security · Impact-Aware SCA

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GHSA-94w9-97p3-p368