Vulnerability-Lookup

GHSA-8PVW-JCV7-9CMJ

Vulnerability from github – Published: 2026-07-24 16:43 – Updated: 2026-07-24 16:43

Summary

@fastify/static vulnerable to Authorization Bypass via Non-Canonical URL Paths

Details

Impact

@fastify/static evaluates the allowedPath callback before normalizing dot segments and duplicate slashes in the pathname used for file resolution. Non-canonical pathnames such as //file, /./file, or /public/../private/file bypass allowedPath filtering while resolving to the intended file on disk.

Applications that use allowedPath as a security boundary to restrict access to specific static files or path subtrees may unintentionally expose files that were intended to be denied.

Patches

Upgrade to @fastify/static >= 10.1.2.

Workarounds

None. Upgrade to the patched version.

Severity

5.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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JSON

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 10.1.1"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@fastify/static"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "10.1.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-7120"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-180"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-24T16:43:44Z",
    "nvd_published_at": "2026-07-23T04:16:33Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\n`@fastify/static` evaluates the `allowedPath` callback before normalizing dot segments and duplicate slashes in the pathname used for file resolution. Non-canonical pathnames such as `//file`, `/./file`, or `/public/../private/file` bypass `allowedPath` filtering while resolving to the intended file on disk.\n\nApplications that use `allowedPath` as a security boundary to restrict access to specific static files or path subtrees may unintentionally expose files that were intended to be denied.\n\n### Patches\n\nUpgrade to `@fastify/static` \u003e= 10.1.2.\n\n### Workarounds\n\nNone. Upgrade to the patched version.",
  "id": "GHSA-8pvw-jcv7-9cmj",
  "modified": "2026-07-24T16:43:44Z",
  "published": "2026-07-24T16:43:44Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/fastify/fastify-static/security/advisories/GHSA-8pvw-jcv7-9cmj"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7120"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fastify/fastify-static/commit/878c72e920fabacf7e37739bf78057044717bf63"
    },
    {
      "type": "WEB",
      "url": "https://cna.openjsf.org/security-advisories.html"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/fastify/fastify-static"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fastify/fastify-static/releases/tag/v10.1.2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "@fastify/static vulnerable to Authorization Bypass via Non-Canonical URL Paths"
}

CVE-2026-7120 (GCVE-0-2026-7120)

Vulnerability from cvelistv5 – Published: 2026-07-23 02:48 – Updated: 2026-07-23 14:15

Title

@fastify/static vulnerable to Authorization Bypass via Non-Canonical URL Paths

Summary

@fastify/static evaluates the allowedPath callback before normalizing dot segments and duplicate path separators in the pathname used for file resolution. Versions up to and including 10.1.1 are affected. An unauthenticated attacker can bypass allowedPath restrictions by requesting equivalent non-canonical pathnames, causing files that were intended to be denied to be served anyway. The bypass does not allow access outside the configured static root by itself, it defeats path-based filtering only. The issue is patched in @fastify/static 10.1.2.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-23 14:15 UTC

CWE

CWE-180 - Incorrect Behavior Order: Validate Before Canonicalize

Assigner

openjs redhat root

References

2 references

URL	Tags
https://github.com/fastify/fastify-static/securit…
https://cna.openjsf.org/security-advisories.html

Impacted products

1 product

Vendor	Product	Version
@fastify/static	@fastify/static	Affected: 0 , < 10.1.2 (semver) Unaffected: 10.1.2 (semver)

Credits

yuki-matsuhashi mcollina UlisesGascon

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.