CVE-2026-28451Network attack vector

Internal resource disclosure via unguarded media fetching

Published Mar 5, 2026 · Updated Mar 5, 2026

SSRF in the Feishu extension in OpenClaw before 2026.2.14 allows remote attackers to read internal resources via crafted media URLs. sendMediaFeishu and Feishu DocX markdown image processing fetched untrusted URLs without destination validation, SSRF policy enforcement, or size limits. Exploitation requires influence over a tool call, directly or through prompt injection, and the fetched response is re-uploaded as Feishu media.

CVSS severity8.6
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in the Feishu extension in OpenClaw before 2026.2.14 allows remote attackers to read internal resources via crafted media URLs. sendMediaFeishu and Feishu DocX markdown image processing fetched untrusted URLs without destination validation, SSRF policy enforcement, or size limits. Exploitation requires influence over a tool call, directly or through prompt injection, and the fetched response is re-uploaded as Feishu media.

The record

CVE
CVE-2026-28451
Published
Mar 5, 2026
Updated
Mar 5, 2026
Vendor
OpenClaw Foundation
Product
OpenClaw
Classifications
CWE-918
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 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 <2026.2.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenClaw Foundation · OpenClawversion=0 <2026.2.14

Published CVSS scores

8.6GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
6.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L
9.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
8.3VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)

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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