CVE-2026-4053— post edit time limit is not enforced on some post update operations
Possible ATT&CK Techniques 1AI
T1114.001 · Local Email CollectionAffected Version Matrix 5
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Mattermost | Mattermost | 11.5.0≤ 11.5.1 | affected |
10.11.0≤ 10.11.13 | affected | ||
11.6.0 | unaffected | ||
11.5.2 | unaffected | ||
10.11.14 | unaffected |
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I. Basic Information for CVE-2026-4053
Vulnerability Information
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Vulnerability Title
post edit time limit is not enforced on some post update operations
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to enforce the PostEditTimeLimit on non-message post fields which allows an authenticated user to modify post file attachments, props, and pin status after the edit window has expired via the post patch and update API endpoints.. Mattermost Advisory ID: MMSA-2026-00631
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在过期或释放后对资源进行操作
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Mattermost | Mattermost | 11.5.0 ~ 11.5.1 | - |
II. Public POCs for CVE-2026-4053
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
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