CVE-2026-42164Network attack vector

Remote disclosure via cross-section backup recall

Published Aug 17, 2026 · Updated Aug 18, 2026

Incorrect access control in Mahara before 25.04.5 and 26.04.0 allows remote attackers to read backups from another Text section. Crafted calls to the Text block recall functionality select content associated with a different section instead of enforcing section boundaries. The vendor identifies remote information disclosure but does not publish whether authentication is required or the exact request parameters, limiting the disclosed consequence to cross-section backup exposure.

CVSS severity9.8
Critical
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect access control in Mahara before 25.04.5 and 26.04.0 allows remote attackers to read backups from another Text section. Crafted calls to the Text block recall functionality select content associated with a different section instead of enforcing section boundaries. The vendor identifies remote information disclosure but does not publish whether authentication is required or the exact request parameters, limiting the disclosed consequence to cross-section backup exposure.

The record

CVE
CVE-2026-42164
Published
Aug 17, 2026
Updated
Aug 18, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-200, T1213
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-200Exposure of Sensitive Information to an Unauthorized Actor
T1213Data from Information Repositories

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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