CVE-2026-24735
Published: 04 February 2026
Summary
CVE-2026-24735 is a high-severity Exposure of Private Personal Information to an Unauthorized Actor (CWE-359) vulnerability in Apache Answer. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 6.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Automated marking identifies private personal information in outputs, tangibly reducing the ability to exploit weaknesses that result in its unauthorized exposure.
Privacy-specific attributes and their controlled association directly reduce exposure of private personal information through missing or incorrect labeling.
Preventing nonpublic personal information from public posting reduces unauthorized exposure of private personal data.
The control detects and protects against mining of private personal information, reducing unauthorized exposure of PII.
Privacy literacy training directly targets preventing exposure of personal information through user mishandling.
Tracking locations of sensitive data and access users reduces risk of private personal information exposure.
PIA explicitly identifies PII collection/use/disclosure flows and drives mitigations that reduce the likelihood of unauthorized exposure of private personal information.
The control specifically requires architectures that minimize privacy risk when processing PII, directly addressing exposure of personal information.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Unauthenticated remote API access in public-facing Apache Answer web app directly enables T1190 (Exploit Public-Facing Application) for initial data access; resulting retrieval of sensitive/deleted content history maps to T1005 (Data from Local System).
NVD Description
Exposure of Private Personal Information to an Unauthorized Actor vulnerability in Apache Answer. This issue affects Apache Answer: through 1.7.1. An unauthenticated API endpoint incorrectly exposes full revision history for deleted content. This allows unauthorized user to retrieve restricted or…
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sensitive information. Users are recommended to upgrade to version 2.0.0, which fixes the issue.
Deeper analysisAI
CVE-2026-24735 is an Exposure of Private Personal Information to an Unauthorized Actor vulnerability (CWE-359) affecting Apache Answer versions through 1.7.1. The issue stems from an unauthenticated API endpoint that incorrectly exposes the full revision history for deleted content, enabling unauthorized access to restricted or sensitive information. It has a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N), indicating high confidentiality impact with no requirements for privileges, user interaction, or elevated scope.
Unauthenticated attackers can exploit this vulnerability remotely over the network with low complexity. By accessing the affected API endpoint, they can retrieve the complete revision history of deleted content, potentially exposing private personal information or other sensitive data that users intended to remove.
Apache advisories recommend upgrading to version 2.0.0, which resolves the issue. Further details are available in the Apache mailing list announcement at https://lists.apache.org/thread/whxloom7mpxlyt5wzdskflsg5mzdzd60 and the oss-security mailing list post at http://www.openwall.com/lists/oss-security/2026/02/04/1.
Details
- CWE(s)