CVE-2026-8305Public exploitNetwork attack vector

Unauthenticated webhook injection via loopback proxy trust

Published May 11, 2026 · Updated May 11, 2026

Authentication bypass in OpenClaw 2026.1.0 through 2026.1.24 allows remote attackers to inject forged BlueBubbles webhook events. handleBlueBubblesWebhookRequest accepts any request whose socket address is loopback instead of requiring the configured shared-secret token. Exploitation requires an enabled BlueBubbles webhook behind a same-host reverse proxy, after which forged sender data can trigger unauthorized workflows.

CVSS severity9.8
Critical
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in OpenClaw 2026.1.0 through 2026.1.24 allows remote attackers to inject forged BlueBubbles webhook events. handleBlueBubblesWebhookRequest accepts any request whose socket address is loopback instead of requiring the configured shared-secret token. Exploitation requires an enabled BlueBubbles webhook behind a same-host reverse proxy, after which forged sender data can trigger unauthorized workflows.

The record

CVE
CVE-2026-8305
Published
May 11, 2026
Updated
May 11, 2026
Vendor
OpenClaw Foundation
Product
OpenClaw
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 11, 2026CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=2026.1.0
  2. Affected versionversion=2026.1.1
  3. Affected versionversion=2026.1.10
  4. Affected versionversion=2026.1.11
  5. Affected versionversion=2026.1.12
  6. Affected versionversion=2026.1.13
  7. Affected versionversion=2026.1.14
  8. Affected versionversion=2026.1.15
  9. Affected versionversion=2026.1.16
  10. Affected versionversion=2026.1.17
  11. Affected versionversion=2026.1.18
  12. Affected versionversion=2026.1.19
  13. Affected versionversion=2026.1.2
  14. Affected versionversion=2026.1.20
  15. Affected versionversion=2026.1.21
  16. Affected versionversion=2026.1.22
  17. Affected versionversion=2026.1.23
  18. Affected versionversion=2026.1.24
  19. Affected versionversion=2026.1.3
  20. Affected versionversion=2026.1.4
  21. Affected versionversion=2026.1.5
  22. Affected versionversion=2026.1.6
  23. Affected versionversion=2026.1.7
  24. Affected versionversion=2026.1.8
  25. Affected versionversion=2026.1.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenClaw Foundation · OpenClawversion=2026.1.0; version=2026.1.1; version=2026.1.10; version=2026.1.11; version=2026.1.12; version=2026.1.13; version=2026.1.14; version=2026.1.15; version=2026.1.16; version=2026.1.17; version=2026.1.18; version=2026.1.19; version=2026.1.2; version=2026.1.20; version=2026.1.21; version=2026.1.22; version=2026.1.23; version=2026.1.24; version=2026.1.3; version=2026.1.4; version=2026.1.5; version=2026.1.6; version=2026.1.7; version=2026.1.8; version=2026.1.9

Published CVSS scores

8.8Upstream issue reporterCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.6Upstream issue reporterCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P
5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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 exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

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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