CVE-2026-48897Network attack vectorHinoki check available

MFA bypass via incorrectly reset session state

Published May 26, 2026 · Updated May 26, 2026

Authentication bypass in Joomla! CMS 4.0.0 through 5.4.5 and 6.0.0 through 6.1.0 allows remote attackers to bypass MFA. The core authentication flow incorrectly resets MFA-related session state, letting a session proceed without the required second-factor check. Exploitation is unauthenticated and network-reachable, but the published CVSS v4 assessment marks attack requirements as present; Joomla has not disclosed the exact request sequence.

CVSS severity8.2
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authentication bypass in Joomla! CMS 4.0.0 through 5.4.5 and 6.0.0 through 6.1.0 allows remote attackers to bypass MFA. The core authentication flow incorrectly resets MFA-related session state, letting a session proceed without the required second-factor check. Exploitation is unauthenticated and network-reachable, but the published CVSS v4 assessment marks attack requirements as present; Joomla has not disclosed the exact request sequence.

The record

CVE
CVE-2026-48897
Published
May 26, 2026
Updated
May 26, 2026
Vendor
Joomla! Project
Product
Joomla! CMS
Classifications
CWE-287
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 26, 2026CVE publishedPublication date reported by the CVE source.
  2. May 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.0.0-5.4.5
  2. Affected versionversion=6.0.0-6.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Joomla! Project · Joomla! CMSversion=4.0.0-5.4.5; version=6.0.0-6.1.0

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
8.2Joomla! ProjectCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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