Common Weakness Enumeration

CWE-918

Allowed

Server-Side Request Forgery (SSRF)

Abstraction: Base · Status: Incomplete

API response cwe.mitre.org

The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

5026 vulnerabilities reference this CWE, most recent first.

CVE-2026-72916 (GCVE-0-2026-72916)

Vulnerability from cvelistv5 – Published: 2026-08-10 21:19 – Updated: 2026-08-10 21:19
VLAI
Title
Mastodon: SSRF Protection Bypass via IPv4-compatible IPv6 Addresses
Summary
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.
Severity
6.3 (Medium)
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
  • CWE-1286 - Improper Validation of Syntactic Correctness of Input
Assigner
References
Impacted products
Vendor Product Version
mastodon mastodon Affected: < 4.4.21
Affected: >= 4.5.0-beta.1, < 4.5.14
Affected: >= 4.6.0-beta.1, < 4.6.4
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-72761 (GCVE-0-2026-72761)

Vulnerability from cvelistv5 – Published: 2026-08-10 14:33 – Updated: 2026-08-10 17:00
VLAI
Title
Webhook SSRF guard bypassed by IPv6 transition addresses (NAT64/6to4/Teredo pass is_global check) in vulnerability-lookup
Summary
The webhook URL validator in `website/notifications/webhooks.py` uses `ip.is_global` to reject non-public addresses after DNS resolution. IPv6 transition addresses (NAT64 `64:ff9b::/96`, 6to4 `2002::/16`, Teredo `2001:0000::/32`) are classified as globally routable by IANA, so `is_global` returns `True` even when the embedded IPv4 targets a private, loopback, or cloud metadata destination. An attacker can register a webhook pointing at a hostname that resolves to a transition address to bypass the SSRF guard and exfiltrate vulnerability data to an internal endpoint. The vulnerability was introduced on a non-release version. The fix was already done on HEAD. It only affects organisation running the HEAD.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Vendor Product Version
vulnerability-lookup vulnerability-lookup Unaffected: 0 , ≤ 5.5.0 (semver)
Create a notification for this product.
Credits
tonghuaroot Cedric Bonhomme
Show details on NVD website
To clipboard 

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CVE-2026-72591 (GCVE-0-2026-72591)

Vulnerability from cvelistv5 – Published: 2026-08-10 10:41 – Updated: 2026-08-10 13:24
VLAI
Title
Koito - Authenticated Server-Side Request Forgery via Album Image URL Parameter
Summary
A 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.
Severity
7.7 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
URL Tags
https://github.com/gabehf/Koito third-party-advisory
Impacted products
Vendor Product Version
gabehf Koito Affected: 0 , ≤ 0.3.2 (semver)
Create a notification for this product.
Date Public
2026-08-10 10:32
Credits
muhammadamin qudratov
Show details on NVD website
To clipboard 

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CVE-2026-72581 (GCVE-0-2026-72581)

Vulnerability from cvelistv5 – Published: 2026-08-10 10:41 – Updated: 2026-08-10 13:17
VLAI
Title
duhow xiaoai-patch - Server-Side Request Forgery in /auth Endpoint
Summary
A 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.
Severity
8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Vendor Product Version
duhow xiaoai-patch Affected: 0 , ≤ fb07049 (git)
Create a notification for this product.
Date Public
2026-08-10 10:32
Credits
Bekzod Tursunov (Stalker)
Show details on NVD website
To clipboard 

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CVE-2026-72566 (GCVE-0-2026-72566)

Vulnerability from cvelistv5 – Published: 2026-08-10 10:40 – Updated: 2026-08-10 13:05
VLAI
Title
automatisch - Server-Side Request Forgery via HTTP Request Custom Action
Summary
A 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.
Severity
7.7 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Vendor Product Version
automatisch automatisch Affected: 0 , ≤ 41f3c56 (git)
Create a notification for this product.
Date Public
2026-08-10 10:32
Credits
Bobur Abdugafforov
Show details on NVD website
To clipboard 

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CVE-2026-71280 (GCVE-0-2026-71280)

Vulnerability from cvelistv5 – Published: 2026-08-05 12:26 – Updated: 2026-08-10 11:47
VLAI
Title
go-shiori Server-Side Request Forgery via Unrestricted Bookmark URL Fetch
Summary
go-shiori's DownloadBookmark (internal/core/download.go) fetches a caller-supplied bookmark URL using a plain http.Client with no custom DialContext or destination-IP validation (no IsLoopback, IsPrivate, IsUnspecified, or IsLinkLocalUnicast checks).
Severity
8.5 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
go-shiori shiori Affected: 0 , ≤ * (custom)
Create a notification for this product.
Date Public
2026-08-05 12:26
Credits
Alibek Baxtiyorov
Show details on NVD website
To clipboard 

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CVE-2026-71271 (GCVE-0-2026-71271)

Vulnerability from cvelistv5 – Published: 2026-08-05 12:26 – Updated: 2026-08-10 11:46
VLAI
Title
Memos Webhook SSRF via 0.0.0.0 Reserved-IP Bypass
Summary
Memos' webhook URL validation, isReservedIP (internal/webhook/validate.go), checks a candidate IP against a reservedCIDRs list that omits 0.0.0.0/8 and never calls ip.IsUnspecified — unlike the correctly implemented sibling function isInternalIP in internal/httpgetter/html_meta.go, which does.
Severity
8.5 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
usememos memos Affected: 0 , ≤ 0.29.1 (semver)
Create a notification for this product.
Date Public
2026-08-05 12:26
Credits
Alibek Baxtiyorov
Show details on NVD website
To clipboard 

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CVE-2026-71270 (GCVE-0-2026-71270)

Vulnerability from cvelistv5 – Published: 2026-08-05 12:26 – Updated: 2026-08-10 11:46
VLAI
Title
Stirling-PDF Server-Side Request Forgery via /api/v1/convert/url/pdf WeasyPrint Subprocess
Summary
Stirling-PDF's POST /api/v1/convert/url/pdf endpoint (ConvertWebsiteToPDF.java) was not updated with the CustomHtmlSanitizer/SsrfProtectionService SSRF protections that were added to three sibling conversion endpoints (html/pdf, file/pdf, markdown/pdf).
Severity
8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
URL Tags
https://github.com/Stirling-Tools/Stirling-PDF third-party-advisory
Impacted products
Vendor Product Version
Stirling-Tools Stirling-PDF Affected: 0 , ≤ * (custom)
Create a notification for this product.
Date Public
2026-08-05 12:26
Credits
Alibek Baxtiyorov
Show details on NVD website
To clipboard 

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          "vendor": "Stirling-Tools",
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          "value": "Alibek Baxtiyorov"
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CVE-2026-71250 (GCVE-0-2026-71250)

Vulnerability from cvelistv5 – Published: 2026-08-05 10:57 – Updated: 2026-08-10 11:46
VLAI
Title
Firefly III - Webhook URL Validation Explicitly Allows Loopback and Is Bypassable via DNS Rebinding
Summary
Firefly III's webhook URL validator (IsValidWebhookUrl.php) filters most private/reserved IPv4 ranges but contains an explicit early-return that allows any resolved address in 127.0.0.0/8, permitting an authenticated user (with webhooks enabled, which is off by default) to configure a webhook targeting loopback services on the server.
Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
URL Tags
https://github.com/firefly-iii/firefly-iii third-party-advisory
Impacted products
Date Public
2026-08-05 10:57
Credits
Bobur Abdugafforov
Show details on NVD website
To clipboard 

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CVE-2026-71246 (GCVE-0-2026-71246)

Vulnerability from cvelistv5 – Published: 2026-08-05 10:56 – Updated: 2026-08-10 11:45
VLAI
Title
Pixelfed - Authenticated SSRF via Remote URL Search
Summary
Pixelfed's SearchController (behind the auth middleware) accepts a URL via its remote-search parameters and fetches it server-side through ActivityPubFetchService, whose validateUrl only blocks the literal hosts 127.0.0.1, localhost, and ::1 and requires https, without checking the resolved IP against private, internal, or link-local ranges (e.g. 169.254.169.254).
Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
URL Tags
https://github.com/pixelfed/pixelfed third-party-advisory
Impacted products
Date Public
2026-08-05 10:56
Credits
Bobur Abdugafforov
Show details on NVD website
To clipboard 

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No mitigation information available for this CWE.

CAPEC-664: Server Side Request Forgery

An adversary exploits improper input validation by submitting maliciously crafted input to a target application running on a server, with the goal of forcing the server to make a request either to itself, to web services running in the server’s internal network, or to external third parties. If successful, the adversary’s request will be made with the server’s privilege level, bypassing its authentication controls. This ultimately allows the adversary to access sensitive data, execute commands on the server’s network, and make external requests with the stolen identity of the server. Server Side Request Forgery attacks differ from Cross Site Request Forgery attacks in that they target the server itself, whereas CSRF attacks exploit an insecure user authentication mechanism to perform unauthorized actions on the user's behalf.

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