GHSA-vhgh-g7x8-4rx8

Source

https://github.com/advisories/GHSA-vhgh-g7x8-4rx8

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-vhgh-g7x8-4rx8/GHSA-vhgh-g7x8-4rx8.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-vhgh-g7x8-4rx8

Aliases

Published

2026-03-26T18:31:42Z

Modified

2026-06-25T23:11:07Z

Severity

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

Summary

Mattermost doesn't validate decompressed archive entry sizes during file extraction

Details

Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to validate decompressed archive entry sizes during file extraction which allows authenticated users with file upload permissions to cause a denial of service via crafted zip archives containing highly compressed entries (zip bombs) that exhaust server memory. Mattermost Advisory ID: MMSA-2026-00598.

Database specific

{
    "cwe_ids":  [
        "CWE-409"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-03-31T23:05:48Z",
    "nvd_published_at":  "2026-03-26T17:16:42Z",
    "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

11.4.0

Fixed

11.4.1

Affected versions

11.*

11.4.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-vhgh-g7x8-4rx8/GHSA-vhgh-g7x8-4rx8.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

11.3.0

Fixed

11.3.2

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-vhgh-g7x8-4rx8/GHSA-vhgh-g7x8-4rx8.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

11.2.0

Fixed

11.2.4

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-vhgh-g7x8-4rx8/GHSA-vhgh-g7x8-4rx8.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

10.11.12

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-vhgh-g7x8-4rx8/GHSA-vhgh-g7x8-4rx8.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

8.0.0-20260105080200-d27a2195068d

Fixed

8.0.0-20260217110922-b7d4a1f1f59b

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-vhgh-g7x8-4rx8/GHSA-vhgh-g7x8-4rx8.json"