---
title: "CVE-2026-100555: OpenClaw - Server Side Request Forgery"
description: "OpenClaw >= 2026.7.1 and < 2026.8.1 contains a server side request forgery caused by loss of DNS pinning in attachment delivery, letting attackers use DNS rebinding to make Synology NAS fetch unauthorized resources, exploit requires attacker to supply a remotely influenced hostname."
url: https://panop.io/threat-heartbeat/CVE-2026-100555/
---

# CVE-2026-100555 OpenClaw - Server Side Request Forgery

OpenClaw >= 2026.7.1 and < 2026.8.1 contains a server side request forgery caused by loss of DNS pinning in attachment delivery, letting attackers use DNS rebinding to make Synology NAS fetch unauthorized resources, exploit requires attacker to supply a remotely influenced hostname.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.20% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-100555)

## Details

Type

Server Side Request Forgery

Impact

Server Side Request Forgery, Information Disclosure

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N

Published

26 September 2026

Updated

15 October 2026

Weakness

[CWE-918](https://cwe.mitre.org/data/definitions/918.html)

## Vendor fix

Upgrade to version 2026.8.1 or later; alternatively, disable remote URL attachment forwarding in Synology Chat.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-100555](https://nvd.nist.gov/vuln/detail/CVE-2026-100555)
- [https://github.com/openclaw/openclaw/security/advisories/GHSA-cf95-m4jv-59rc](https://github.com/openclaw/openclaw/security/advisories/GHSA-cf95-m4jv-59rc)
- [https://www.vulncheck.com/advisories/openclaw-before-2026.8.1-dns-rebinding-via-attachment-delivery](https://www.vulncheck.com/advisories/openclaw-before-2026.8.1-dns-rebinding-via-attachment-delivery)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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