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CVE-2026-4055VulnerabilityPublished Updated

Mattermost: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

Affects Bundesamt für Sicherheit in der Informationstechnik MattermostSource GCVE Database

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Mentioned vulnerabilities

Not known to be exploited : upgrade to 11.7.0 when convenient.

Data as of 30 Oct 2026, 06:59 UTC

Severity
Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS
0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 11.7.0

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 19 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade Bundesamt für Sicherheit in der Informationstechnik Mattermost to 11.7.0.

Affected software

ProductAffectedFixed in
Bundesamt für Sicherheit in der Informationstechnik MattermostAffected
  • <11.7.0
  • =11.7.0
Fixed in
  • 11.7.0

AI-suggested

Until official patches or fixes are available, users should monitor vendor communications and apply updates once released.

Description

Multiple unspecified vulnerabilities have been identified in Mattermost versions prior to 11.7.0. These vulnerabilities could potentially allow attacks, but specific attack vectors and impacts are not detailed in the available information. No known exploits are reported in the wild. The vulnerabilities are documented by the Bundesamt für Sicherheit in der Informationstechnik. There is no CVSS score or detailed technical description available to assess the exact nature of the weaknesses. Patch availability is not confirmed in the provided data. Users of Mattermost versions below 11.7.

References

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