GHSA-cjm8-jxpw-g43m

Source

https://github.com/advisories/GHSA-cjm8-jxpw-g43m

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-cjm8-jxpw-g43m/GHSA-cjm8-jxpw-g43m.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-cjm8-jxpw-g43m

Aliases

Published

2026-05-18T09:31:47Z

Modified

2026-06-25T19:56:01Z

Severity

4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L CVSS Calculator

Summary

Mattermost doesn't validate 7zip archive structure before processing

Details

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to validate 7zip archive structure before processing which allows an authenticated attacker to cause server memory exhaustion and denial of service via uploading a specially crafted 7zip file with excessive folder declarations.. Mattermost Advisory ID: MMSA-2026-00573

Database specific

{
    "cwe_ids":  [
        "CWE-789"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-06-01T15:09:30Z",
    "nvd_published_at":  "2026-05-18T08:16:14Z",
    "severity":  "MODERATE"
}

References

Affected packages

github.com/mattermost/mattermost/server/v8

Package

Name: github.com/mattermost/mattermost/server/v8; View open source insights on deps.dev
Purl: pkg:golang/github.com/mattermost/mattermost/server/v8

Affected ranges

Type: SEMVER
Events: Introduced

11.5.0

Fixed

11.5.2

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-cjm8-jxpw-g43m/GHSA-cjm8-jxpw-g43m.json"

github.com/mattermost/mattermost/server/v8

Package

Name: github.com/mattermost/mattermost/server/v8; View open source insights on deps.dev
Purl: pkg:golang/github.com/mattermost/mattermost/server/v8

Affected ranges

Type: SEMVER
Events: Introduced

10.11.0

Fixed

10.11.14

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-cjm8-jxpw-g43m/GHSA-cjm8-jxpw-g43m.json"

github.com/mattermost/mattermost/server/v8

Package

Name: github.com/mattermost/mattermost/server/v8; View open source insights on deps.dev
Purl: pkg:golang/github.com/mattermost/mattermost/server/v8

Affected ranges

Type: SEMVER
Events: Introduced

11.4.0

Fixed

11.4.4

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-cjm8-jxpw-g43m/GHSA-cjm8-jxpw-g43m.json"

github.com/mattermost/mattermost/server/v8

Package

Name: github.com/mattermost/mattermost/server/v8; View open source insights on deps.dev
Purl: pkg:golang/github.com/mattermost/mattermost/server/v8

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

8.0.0-20260325191733-fb11968f8798

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-cjm8-jxpw-g43m/GHSA-cjm8-jxpw-g43m.json"

github.com/mattermost/mattermost-server

Package

Name: github.com/mattermost/mattermost-server; View open source insights on deps.dev
Purl: pkg:golang/github.com/mattermost/mattermost-server

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

5.3.2-0.20260325191733-fb11968f8798

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-cjm8-jxpw-g43m/GHSA-cjm8-jxpw-g43m.json"