CVE WatchAug 10, 2026

CVE-2026-72916

Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.21, 4.5.14, 4.6.4, and 4.7.0-beta.1, PrivateAddress

CVSS

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No CVSS

EPSS

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KEV

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Exploit Today

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0-100

Published: Aug 10, 2026 · Last modified: Aug 10, 2026 · CWE-918 · CWE-1286

EPSS · 30d

Not enough EPSS history yet.

Technical description

Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.21, 4.5.14, 4.6.4, and 4.7.0-beta.1, PrivateAddressCheck.private_address? in app/lib/private_address_check.rb normalized IPv4-mapped IPv6 addresses but did not recognize IPv4-compatible IPv6 addresses with IPAddr#ipv4_compat?. An attacker could supply an address in the omitted range to bypass the ALLOWED_PRIVATE_ADDRESSES protection and make Mastodon send HTTP requests to loopback interfaces, potentially accessing private resources and services. Exploitation requires a system that supports the obsolete IPv4-compatible IPv6 mechanism. This issue is fixed in versions 4.4.21, 4.5.14, 4.6.4, and 4.7.0-beta.1.

Official references

Related CVEs

CVECVSSEPSSKEVRExploitTitleMod.

CVE-2026-72761—

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——0A server-side request forgery (SSRF) vulnerability in gabehf/Koito through v0.3.2 allows an authenticated user to make the server perform HTTP requests to arbitrary internal or external hosts by supplying a crafted image_url value in the PATCH /apis/web/v1/album/{id}/image endpoint.12h CVE-2026-725818.6 HIG

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——0A server-side request forgery (SSRF) vulnerability in duhow/xiaoai-patch through commit fb07049 allows a remote attacker to make the Xiaomi smart speaker perform HTTP requests to arbitrary internal or external URLs. The /auth endpoint in api/main.py uses the user-supplied url POST parameter to redirect to a Home Assistant instance without validating the destination URL, enabling internal network scanning and access to internal services.12h CVE-2026-725667.7 HIG

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——0A server-side request forgery (SSRF) vulnerability in automatisch through commit 41f3c56 allows a low-privileged authenticated user with 'manage Flow' permission to make the server fetch arbitrary URLs and retrieve the full response body via the HTTP Request app's Custom Request action.12h CVE-2026-193756.3 MED

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——0A vulnerability was detected in dmitriiweb article-scraper-mcp 1.0.0. This vulnerability affects the function fetch_article of the file news_scraper_mcp/server.py. The manipulation of the argument url results in server-side request forgery. The attack may be performed from remote. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.8h CVE-2026-193747.3 HIG

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——0A security vulnerability has been detected in adafap api-mcp up to 92b9a5d04acfec165c7d4ef852496593aa87be06. This affects the function customAxios of the file app/api/proxy/route.ts of the component Proxy API Endpoint. The manipulation of the argument url leads to server-side request forgery. The attack is possible to be carried out remotely. This product adopts a rolling release strategy to maintain continuous delivery. Therefore, version details for affected or updated releases cannot be specified. The project was informed of the problem early through an issue report but has not responded yet.5h