CVE-2026-90910Network attack vector

Metadata disclosure via missing reaction visibility checks

Published Oct 19, 2026 · Updated Oct 19, 2026

Authorization bypass in Apache Answer 2.0.2 and earlier allows remote attackers to read restricted reaction metadata via the reaction API. The API omits content visibility checks when reading reaction metadata or adding and removing the caller's own reactions. Network access to the API exposes restricted-content reaction information; reaction changes are limited to the caller's own reactions, not arbitrary content edits.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Apache Answer 2.0.2 and earlier allows remote attackers to read restricted reaction metadata via the reaction API. The API omits content visibility checks when reading reaction metadata or adding and removing the caller's own reactions. Network access to the API exposes restricted-content reaction information; reaction changes are limited to the caller's own reactions, not arbitrary content edits.

The record

CVE
CVE-2026-90910
Published
Oct 19, 2026
Updated
Oct 19, 2026
Vendor
The Apache Software Foundation
Product
Apache Answer
Classifications
CWE-306
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 19, 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=0 <=2.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Answerversion=0 <=2.0.2

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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