CVE-2026-16075Public exploitNetwork attack vector

Cross-user session metadata disclosure via username override

Published Jul 18, 2026 · Updated Jul 18, 2026

Authorization bypass in AstrBot 4.25.0 through 4.25.5 allows remote authenticated users to read other users' WebChat session metadata. OpenApiRoute.get_chat_sessions ignores the API-key principal and passes the caller-controlled username to the database creator filter. A valid chat-scope API key and a known or guessable victim username expose session IDs, platform IDs, display names, creators, and timestamps.

CVSS severity4.3
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in AstrBot 4.25.0 through 4.25.5 allows remote authenticated users to read other users' WebChat session metadata. OpenApiRoute.get_chat_sessions ignores the API-key principal and passes the caller-controlled username to the database creator filter. A valid chat-scope API key and a known or guessable victim username expose session IDs, platform IDs, display names, creators, and timestamps.

The record

CVE
CVE-2026-16075
Published
Jul 18, 2026
Updated
Jul 18, 2026
Vendor
AstrBotDevs
Product
AstrBot
Classifications
CWE-639, CWE-285, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

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

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.25.0
  2. Affected versionversion=4.25.1
  3. Affected versionversion=4.25.2
  4. Affected versionversion=4.25.3
  5. Affected versionversion=4.25.4
  6. Affected versionversion=4.25.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

AstrBotDevs · AstrBotversion=4.25.0; version=4.25.1; version=4.25.2; version=4.25.3; version=4.25.4; version=4.25.5

Published CVSS scores

4.3AstrBotDevs GitHub issue #8866CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
CWE-285Improper Authorization
T1213Data from Information Repositories

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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