CVE-2025-64184: Dosage Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-4vcx-3pj3-44m7
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CVSS 8.8
CWE-22
Published
Advisory Summary

CVE-2025-64184 is a HIGH (CVSS 8.8) denial of service vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Dosage libraries in the PyPI ecosystem. The issue involves dosage vulnerable to a directory traversal through crafted http responses. Remediation is available by upgrading affected packages to version 3.2.

CVE-2025-64184 at a Glance

CVE Identifier CVE-2025-64184
GHSA Identifier GHSA-4vcx-3pj3-44m7
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Dosage
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 8.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2025-64184

To remediate this vulnerability, upgrade all affected Dosage dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

dosage fixed: 3.2 
pip install dosage>=3.2
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show dosage

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2025-64184, inspect your installed packages using pip:

pip show dosage

Analyze the terminal output to locate any version of Dosage in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.2), your application is affected.

Note: The pip show dosage command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Dosage, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact When downloadinging comic images, Dosage constructs target file names from different aspects of the remote comic (page URL, image URL, page content, etc.). While the basename is properly stripped of directory-traversing characters, the file extension is taken from the HTTP `Content-Type` header. This allows a remote attacker (or a Man-in-the-Middle, if the comic is served over HTTP) to write arbitrary files outside the target directory (if additional conditions are met). ### Patches Fixed in release 3.2. The [fix is small and self-contained](https://github.com/webcomics/dosage/commit/336a9684191604bc49eed7296b74bd582151181e), so distributors might elect to backport the fix to older versions. ### Workarounds No

CVE-2025-64184 Affected Dosage Versions

1 component(s)
Fixed Versions:
3.2
Product / Package Ecosystem Affected Versions Fixed Version
dosage
pypi/dosage
PyPI
< 3.2
3.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/webcomics/dosage/security/advisories/GHSA-4vcx-3pj3-44m7
NVD — CVE-2025-64184 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-64184
Security Fix Commit FIX COMMIT
https://github.com/webcomics/dosage/commit/336a9684191604bc49eed7296b74bd582151181e
Dosage Source Repository REPOSITORY
https://github.com/webcomics/dosage

Frequently Asked Questions

What is CVE-2025-64184?
CVE-2025-64184 is a security vulnerability in Dosage involving Dosage vulnerable to a Directory Traversal through crafted HTTP responses under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Dosage versions are affected?
Affected versions include releases prior to 3.2 across affected packages: dosage.
What version fixes CVE-2025-64184?
Upgrading to 3.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is dosage affected?
Yes, dosage is affected in releases prior to 3.2. Upgrade your dependency to 3.2 or later.
What is the CVSS score of CVE-2025-64184?
CVE-2025-64184 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2025-64184?
CVE-2025-64184 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check PyPI dependencies for CVE-2025-64184?
Run the dependency tree command: 'pip show dosage'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-4vcx-3pj3-44m7",
  "modified" : "2025-11-07T16:42:26Z",
  "published" : "2025-11-04T15:31:48Z",
  "aliases" : [ "CVE-2025-64184" ],
  "summary" : "Dosage vulnerable to a Directory Traversal through crafted HTTP responses",
  "details" : "### Impact\n\nWhen downloadinging comic images, Dosage constructs target file names from different aspects of the remote comic (page URL, image URL, page content, etc.). While the basename is properly stripped of directory-traversing characters, the file extension is taken from the HTTP `Content-Type` header. This allows a remote attacker (or a Man-in-the-Middle, if the comic is served over HTTP) to write arbitrary files outside the target directory (if additional conditions are met). \n\n### Patches\n\nFixed in release 3.2. The [fix is small and self-contained](https://github.com/webcomics/dosage/commit/336a9684191604bc49eed7296b74bd582151181e), so distributors might elect to backport the fix to older versions.\n\n### Workarounds\n\nNo",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "dosage"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/webcomics/dosage/security/advisories/GHSA-4vcx-3pj3-44m7"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-64184"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/webcomics/dosage/commit/336a9684191604bc49eed7296b74bd582151181e"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/webcomics/dosage"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-11-04T15:31:48Z",
    "nvd_published_at" : "2025-11-07T04:15:46Z"
  }
}