CVE-2023-45559Public exploitNetwork attack vector

Unauthorized notifications via leaked channel access token

Published Jan 3, 2024 · Updated Jul 9, 2026

Channel access-token exposure in Tamaki_hamanoki Line 13.6.1 allows remote attackers to send crafted notifications to users. The public record identifies leakage of the channel access token but does not disclose the component or operation that exposes it. No authentication or user interaction is required; possession of the leaked token permits unauthorized notification delivery, while no service interruption is reported.

CVSS severity8.2
High
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Channel access-token exposure in Tamaki_hamanoki Line 13.6.1 allows remote attackers to send crafted notifications to users. The public record identifies leakage of the channel access token but does not disclose the component or operation that exposes it. No authentication or user interaction is required; possession of the leaked token permits unauthorized notification delivery, while no service interruption is reported.

The record

CVE
CVE-2023-45559
Published
Jan 3, 2024
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1528
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 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

8.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
8.2CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A: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.

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 exploitPublished

Weakness, pattern, technique

T1528Steal Application Access Token

Public exploit references

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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