OpenRun: Redirect URL validation bypass using //host paths leads to Open Redirect

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

OpenRun is an open-source, self-hosted GitOps platform for deploying web apps and internal tools to Docker or Kubernetes. Prior to version 0.17.7, the restrictions on redirect URLs in openrun can be bypassed by attackers, leading to open redirect attacks. This issue has been patched in version 0.17.7.

Source published

1 Oct 2026 19:52:31 UTC

Source modified

16 Oct 2026 18:34:36 UTC

Observed here

23 Oct 2026 15:48:27 UTC

Source terms

CVE Program Terms of Use

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · 5.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N

OpenRun is an open-source, self-hosted GitOps platform for deploying web apps and internal tools to Docker or Kubernetes. Prior to version 0.17.7, the restrictions on redirect URLs in openrun can be bypassed by attackers, leading to open redirect attacks. This issue has been patched in version 0.17.7.

Source published

Oct 1, 2026, 7:52:31 PM (timezone not stated)

Source modified

Oct 16, 2026, 6:34:36 PM (timezone not stated)

Observed here

7 Nov 2026 12:31:53 UTC

Source terms

ENISA EUVD · source terms and attribution apply

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 4.0 · 5.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N

OpenRun is an open-source, self-hosted GitOps platform for deploying web apps and internal tools to Docker or Kubernetes. Prior to version 0.17.7, the restrictions on redirect URLs in openrun can be bypassed by attackers, leading to open redirect attacks. This issue has been patched in version 0.17.7.

Source published

1 Oct 2026 20:17:26 UTC

Source modified

16 Oct 2026 19:17:07 UTC

Observed here

25 Oct 2026 13:17:34 UTC

Source terms

NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · [email protected] · Secondary · 5.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

### Summary The restrictions on redirect URLs in `openrun` can be bypassed by attackers, leading to open redirect attacks. ### Details In the current project, the referrer header value is used for subsequent redirects, so there is currently a validation for this redirect value. The current validation logic requires that the host and schema of the redirect URL be the same as the current website's URL, and finally, the path part is used for redirection. This check seems robust, but it can still be bypassed by attackers. <img width="1606" height="1346" alt="QQ20260602-140205-2-2" src="https://github.com/user-attachments/assets/83c549f3-38d7-444d-90f0-131d806f67ff" /> Here's the problem: Assuming the current website is `http://127.0.0.1:25222/`, if the attacker passes in a redirect URL of `http://127.0.0.1:25222//fushuling.com`, its host and schema are obviously the same as the current website, thus bypassing the verification. However, the issue lies in the final redirect URL, which is the path part of the URL, i.e., `//fushuling.com`. Browsers automatically complete the HTTP header for URLs starting with `//`, ultimately successfully bypassing the restriction and redirecting to the external address `http://fushuling.com`. This vulnerable behavior was successfully reproduced locally. Normally, specifying an external address directly will be blocked, so it will not redirect. <img width="1587" height="717" alt="QQ20260602-140756-2-3" src="https://github.com/user-attachments/assets/51430c42-bd10-401b-9c9f-27a91a0bc648" /> However, if the redirect URL is `http://127.0.0.1:25222//fushuling.com`, the existing validation logic is bypassed, and the Location header is successfully set to `//fushuling.com`. ``` POST /redirecttest/abc/frag HTTP/1.1 Host: 127.0.0.1:25222 Referer: http://127.0.0.1:25222//fushuling.com Cache-Control: max-age=0 sec-ch-ua: "Not(A:Brand";v="24", "Chromium";v="122" sec-ch-ua-mobile: ?0 sec-ch-ua-platform: "Windows" Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.57 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7 Sec-Fetch-Site: none Sec-Fetch-Mode: navigate Sec-Fetch-User: ?1 Sec-Fetch-Dest: document Accept-Encoding: gzip, deflate, br Accept-Language: zh-CN,zh;q=0.9 Connection: close Content-Type: application/x-www-form-urlencoded Content-Length: 0 ``` <img width="1536" height="729" alt="QQ20260602-140925-2-4" src="https://github.com/user-attachments/assets/31fde919-5f90-409f-8b14-af6c9c71761b" /> The user was then successfully redirected to the external address `http://fushuling.com`. <img width="1692" height="855" alt="QQ20260602-141005-2-5" src="https://github.com/user-attachments/assets/83b43ef6-52fa-4218-908b-7795394ae707" /> ### PoC ``` http://127.0.0.1:25222//fushuling.com ``` ### Impact Open Redirect

Source published

9 Jul 2026 23:19:39 UTC

Source modified

21 Jul 2026 19:18:54 UTC

Observed here

24 Oct 2026 13:19:41 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N

Publisher rating · MODERATE

OpenRun: Redirect URL validation bypass using  //host  paths leads to Open Redirect in github.com/openrundev/openrun

Source published

17 Jul 2026 19:42:05 UTC

Source modified

21 Jul 2026 19:15:27 UTC

Observed here

24 Oct 2026 13:19:41 UTC

Source terms

OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.