CVE-2026-44263: Weblate Weblate Vulnerable To Private Translation Vulnerability

MODERATE
Advisory Identifier: GHSA-gcg5-86jr-f7jg
Share
CVSS 4.3
CWE-203
Published
Advisory Summary

CVE-2026-44263 is a MODERATE (CVSS 4.3) weblate vulnerable to private translation vulnerability (CWE-203: Observable Discrepancy) affecting Weblate libraries in the PyPI ecosystem. The issue involves weblate vulnerable to private translation enumeration via screenshot api. Remediation is available by upgrading affected packages to version 5.17.1.

CVE-2026-44263 at a Glance

CVE Identifier CVE-2026-44263
GHSA Identifier GHSA-gcg5-86jr-f7jg
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-203: Observable Discrepancy
Affected Product Weblate
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 4.3

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

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

How to Fix CVE-2026-44263

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

weblate fixed: 5.17.1 
pip install weblate>=5.17.1
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 weblate

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-44263, inspect your installed packages using pip:

pip show weblate

Analyze the terminal output to locate any version of Weblate in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 5.17.1), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-203: Observable Discrepancy, where the product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor. In Weblate, 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 The screenshots, tasks, and component link API allowed for the enumeration of translations in a project inaccessible to the user. ### Patches * https://github.com/WeblateOrg/weblate/pull/19258 ### Acknowledgement Weblate thanks Luay for reporting this vulnerability according to the organization's [security issues guideline](https://docs.weblate.org/en/latest/security/issues.html).

CVE-2026-44263 Affected Weblate Versions

1 component(s)
Fixed Versions:
5.17.1
Product / Package Ecosystem Affected Versions Fixed Version
weblate
pypi/weblate
PyPI
< 5.17.1
5.17.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/WeblateOrg/weblate/security/advisories/GHSA-gcg5-86jr-f7jg
NVD — CVE-2026-44263 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-44263
Weblate Source Repository REPOSITORY
https://github.com/WeblateOrg/weblate/pull/19258
Security Fix Commit FIX COMMIT
https://github.com/WeblateOrg/weblate/commit/6cf892c7bd50b667a65a99d716a90694f7d9f203
Weblate Source Repository REPOSITORY
https://github.com/WeblateOrg/weblate
Weblate Release RELEASE
https://github.com/WeblateOrg/weblate/releases/tag/weblate-5.17.1

Frequently Asked Questions

What is CVE-2026-44263?
CVE-2026-44263 is a security vulnerability in Weblate involving Weblate Vulnerable to Private Translation Enumeration via Screenshot API under CWE-203: Observable Discrepancy.
Which Weblate versions are affected?
Affected versions include releases prior to 5.17.1 across affected packages: weblate.
What version fixes CVE-2026-44263?
Upgrading to 5.17.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is weblate affected?
Yes, weblate is affected in releases prior to 5.17.1. Upgrade your dependency to 5.17.1 or later.
What is the CVSS score of CVE-2026-44263?
CVE-2026-44263 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2026-44263?
CVE-2026-44263 is classified under CWE-203: Observable Discrepancy (The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.).
How can I check PyPI dependencies for CVE-2026-44263?
Run the dependency tree command: 'pip show weblate'. 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-gcg5-86jr-f7jg",
  "modified" : "2026-05-08T21:47:47Z",
  "published" : "2026-05-07T00:03:50Z",
  "aliases" : [ "CVE-2026-44263" ],
  "summary" : "Weblate Vulnerable to Private Translation Enumeration via Screenshot API",
  "details" : "### Impact\n\nThe screenshots, tasks, and component link API allowed for the enumeration of translations in a project inaccessible to the user.\n\n### Patches\n* https://github.com/WeblateOrg/weblate/pull/19258\n\n### Acknowledgement\nWeblate thanks Luay for reporting this vulnerability according to the organization's [security issues guideline](https://docs.weblate.org/en/latest/security/issues.html).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "weblate"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "5.17.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/WeblateOrg/weblate/security/advisories/GHSA-gcg5-86jr-f7jg"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-44263"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/WeblateOrg/weblate/pull/19258"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/WeblateOrg/weblate/commit/6cf892c7bd50b667a65a99d716a90694f7d9f203"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/WeblateOrg/weblate"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/WeblateOrg/weblate/releases/tag/weblate-5.17.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-203" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-07T00:03:50Z",
    "nvd_published_at" : "2026-05-07T15:16:10Z"
  }
}