CVE-2026-91146Network attack vectorHinoki check available

Stored cross-site scripting via unrestricted link schemes

Published Sep 14, 2026 · Updated Sep 14, 2026

Stored cross-site scripting in Takahē 0.11.0 and earlier allows remote attackers to execute script through federated content. Link rendering preserves attacker-controlled javascript: href values in federated posts and profile summaries instead of restricting URL schemes. A viewer must click the malicious link; execution occurs in the instance origin and enables session hijacking or impersonation.

CVSS severityUnavailable
Unscored
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored cross-site scripting in Takahē 0.11.0 and earlier allows remote attackers to execute script through federated content. Link rendering preserves attacker-controlled javascript: href values in federated posts and profile summaries instead of restricting URL schemes. A viewer must click the malicious link; execution occurs in the instance origin and enables session hijacking or impersonation.

The record

CVE
CVE-2026-91146
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
Takahē
Product
Takahē
Classifications
T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 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 <=0.11.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Takahē · Takahēversion=0 <=0.11.0

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.

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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

T1189Drive-by Compromise

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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