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VulnerabilityPublished Updated

CVE-2026-28465: OpenClaw voice-call · Authentication Bypass by Spoofing

Affects OpenClaw voice-callSource CVE Database V5

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Not known to be exploited · CVSS 8.2 High : upgrade to 2026.2.3 soon.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 4.0 base score
8.2High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 33% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2026.2.3
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 5 Mar 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade OpenClaw voice-call to 2026.2.3.

Affected software

ProductAffectedFixed in
OpenClawvoice-callAffected
  • <2026.2.3
Fixed in
  • 2026.2.3

AI-suggested

To mitigate CVE-2026-28465, organizations should immediately upgrade OpenClaw voice-call plugins to version 2026.2.3 or later once available. In the interim, administrators should implement strict validation of Forwarded and X-Forwarded-* headers at the reverse proxy level, ensuring that only trusted proxies can set or forward these headers. This can be achieved by configuring proxies to remove or overwrite untrusted headers and by restricting access to webhook endpoints to known IP addresses or networks. Additionally, implementing mutual TLS authentication between proxies and backend services can reduce header spoofing risks. Monitoring webhook traffic for anomalies and enabling detailed logging can help detect potential exploitation attempts. Finally, reviewing and hardening webhook authentication mechanisms to avoid reliance on client-supplied headers for trust decisions is critical for long-term security.

Description

OpenClaw's voice-call plugin versions before 2026.2.3 contain an improper authentication vulnerability in webhook verification that allows remote attackers to bypass verification by supplying untrusted forwarded headers. Attackers can spoof webhook events by manipulating Forwarded or X-Forwarded-* headers in reverse-proxy configurations that implicitly trust these headers.

References

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