CVE-2026-93712

Description

Dancer2 versions from 2.1.0 before 2.2.0 for Perl serve files from outside public_dir via relative path segments in the File route handler. The handler joins the request path onto public_dir without collapsing relative segments, and checks only that the result is a readable regular file. A request for `/../outside.txt` escapes public_dir, and percent-encoding the dots reaches the same file. The handler is off by default. An application is affected once it names File in route_handlers and sets static_handler to 0, which otherwise refuses a dot segment before the route runs. Any file the worker process can read is served to an unauthenticated request, including the application's config.yml above public_dir.

Overview

State: PUBLISHED
Assigner (CNA): CPANSec
CVSS severity: —
CVSS score: —
CVSS vector: —
Effective score: no score available from CNA, NVD, or AI yet
CWE(s): CWE-22
Reserved: 2026-09-18
Published: 2026-09-22 00:52 UTC
Last updated: 2026-09-22 19:19 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/93xxx/CVE-2026-93712.json

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Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-22 01:16:55 UTC
NVD last modified: 2026-09-22 01:16:55 UTC

AI-forensic CVSS estimate

Used only when a CVE has no official CVSS from its CNA or NVD. An LLM estimates the v3.1 base score from the description; a HIGH/CRITICAL estimate promotes the CVE to a Threat.

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European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-84258
Assigner: CPANSec
Published: Sep 22, 2026, 12:52:36 AM
Updated: Sep 22, 2026, 2:09:48 AM
EUVD base score: 0.0 / 10
EUVD-reported EPSS: 0.0000
Aliases: GHSA-fq22-f6q5-wv3x

ENISA description: Dancer2 versions from 2.1.0 before 2.2.0 for Perl serve files from outside public_dir via relative path segments in the File route handler. The handler joins the request path onto public_dir without collapsing relative segments, and checks only that the result is a readable regular file. A request for `/../outside.txt` escapes public_dir, and percent-encoding the dots reaches the same file. The handler is off by default. An application is affected once it names File in route_handlers and sets static_handler to 0, which otherwise refuses a dot segment before the route runs. Any file the worker process can read is served to an unauthenticated request, including the application's config.yml above public_dir.

EUVD references (3)

Affected products (1)

Vendor	Product	Versions	Platforms
—	—	`2.1.0` (affected)	—

Vendor references (3)

References embedded in the original CVE record by the assigning CNA.

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (3)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://github.com/PerlDancer/Dancer2/commit/2446a09ffb83fef71cc75c327bd6e4b1f007b885.patch 9b29abf9-4ab0-4765-b253-1875cd9b441e
https://github.com/PerlDancer/Dancer2/security/advisories/GHSA-6xw8-v24c-m783 9b29abf9-4ab0-4765-b253-1875cd9b441e
https://metacpan.org/release/CROMEDOME/Dancer2-2.2.0/changes 9b29abf9-4ab0-4765-b253-1875cd9b441e

Remediations (10)

Microsoft Update Catalog

web:catalog.update.microsoft.com

Welcome to the Microsoft Update Catalog site. We want your feedback! Visit our newsgroup or send us an email to provide us with your thoughts and suggestions. To get started using the site, enter in your search terms in the Search box above or visit our FAQ for search tips. |Newsgroup|Send us your feedback

2026-09-22 17:07 UTC
Security Update Guide - Microsoft

web:msrc.microsoft.com

The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

2026-09-22 17:07 UTC
Security Update Guide - Microsoft Security Response Center

web:msrc.microsoft.com

Access Microsoft Security Response Center's guide to address vulnerabilities, manage security risks, and keep your systems protected with the latest updates.

2026-09-22 17:07 UTC
Microsoft Patch Tracker (September 2026): Exploit-Ranked | Senserva

web:senserva.com

Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

2026-09-22 17:07 UTC
Portal for ArcGIS Security 2026 Update 2 Patch - Esri Support

web:support.esri.com

This patch deals specifically with the issues listed below under Issues Addressed with this Patch . As part of the patch installation, the Portal for ArcGIS service is stopped and restarted. The restart may take several minutes depending on the number of items on the enterprise deployment. As a best practice, clear the browser cache and re-launch the browser after installing the patch . This ...

2026-09-22 17:07 UTC
March 13, 2026—Hotpatch KB5084597 (OS Builds 26200.7982 and 26100.7982 ...

web:support.microsoft.com

This update for Windows 11, version 25H2 and 24H2 (KB5084597) incudes security improvements. To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained. For information on Windows update terminology, see the different types of Windows software updates. To view the ...

2026-09-22 17:07 UTC
SAP Security Patch Day - June 2026

web:support.sap.com

SAP security Patch Day Bulletin This post shares the information on security notes that remediate vulnerabilities discovered in SAP products. SAP strongly recommends that the customer visits the support portal and applies patches on priority to protect their SAP landscape. On 9th of June 2026 , SAP security patch day saw the release of 15 new security notes.

2026-09-22 17:07 UTC
Microsoft Technical Security Notifications

web:www.microsoft.com

Help protect your computing environment by keeping up to date on Microsoft technical security notifications. Security Update Guide Notifications Microsoft's free Security Update Guide Notifications provide links to security-related software updates and notification of re-released security updates. These notifications are sent via email throughout the month as needed. You can choose the type of ...

2026-09-22 17:07 UTC
Oracle Critical Patch Update Advisory - July 2026

web:www.oracle.com

This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

2026-09-22 17:07 UTC
Oracle Critical Security Patch Update Advisory - June 2026

web:www.oracle.com

Additional CVEs addressed are: The patch for CVE - 2026 -34481 also addresses CVE - 2026 -34477, CVE - 2026 -34478, CVE - 2026 -34479, and CVE - 2026 -34480. Oracle Fusion Middleware Risk Matrix This Critical Security Patch Update contains 106 new security patches for Oracle Fusion Middleware. 53 of these vulnerabilities may be remotely exploitable without authentication, i.e., may be exploited over a ...

2026-09-22 17:07 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-93712.json.

{
  "containers": {
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        "providerMetadata": {
          "dateUpdated": "2026-09-22T02:09:48.478Z",
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        "metrics": [
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              "confidentialityImpact": "HIGH",
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              "content": {
                "id": "CVE-2026-93712",
                "options": [
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                "role": "CISA Coordinator",
                "timestamp": "2026-09-22T19:19:41.602914Z",
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          "shortName": "CISA-ADP"
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    ],
    "cna": {
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          ],
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      "descriptions": [
        {
          "lang": "en",
          "value": "Dancer2 versions from 2.1.0 before 2.2.0 for Perl serve files from outside public_dir via relative path segments in the File route handler.\n\nThe handler joins the request path onto public_dir without collapsing relative segments, and checks only that the result is a readable regular file. A request for `/../outside.txt` escapes public_dir, and percent-encoding the dots reaches the same file.\n\nThe handler is off by default. An application is affected once it names File in route_handlers and sets static_handler to 0, which otherwise refuses a dot segment before the route runs.\n\nAny file the worker process can read is served to an unauthenticated request, including the application's config.yml above public_dir."
        }
      ],
      "problemTypes": [
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          "descriptions": [
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              "cweId": "CWE-22",
              "description": "CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
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      "references": [
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          "tags": [
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          "url": "https://github.com/PerlDancer/Dancer2/security/advisories/GHSA-6xw8-v24c-m783"
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          "url": "https://github.com/PerlDancer/Dancer2/commit/2446a09ffb83fef71cc75c327bd6e4b1f007b885.patch"
        },
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          "tags": [
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          "url": "https://metacpan.org/release/CROMEDOME/Dancer2-2.2.0/changes"
        }
      ],
      "solutions": [
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          "value": "Upgrade to Dancer2 2.2.0 or later."
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      ],
      "source": {
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      },
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          "lang": "en",
          "time": "2026-09-16T00:00:00.000Z",
          "value": "Version 2.2.0 released with fix."
        }
      ],
      "title": "Dancer2 versions from 2.1.0 before 2.2.0 for Perl serve files from outside public_dir via relative path segments in the File route handler",
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  "cveMetadata": {
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    "dateReserved": "2026-09-18T15:07:22.163Z",
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    "state": "PUBLISHED"
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