GHSA-3qq3-668m-v9mj is a medium-severity (CVSS 4.9) Improper Input Validation vulnerability in gogs.io/gogs. A fix is available for gogs.io/gogs — see the affected versions and patch details below.
Gogs has a Denial of Service in repository/wiki file listing web pages
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for GHSA-3qq3-668m-v9mj.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
GHSA-3qq3-668m-v9mj plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,166 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
gogs.io/gogsReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
Summary
A malicious user with rights to create a new file on a repository or wiki page can trigger a denial of service condition in which the pages containing the listing of files will return HTTP error 500 and render the web interface unusable for the repository or wiki.
Details
The issue is present in file internal/route/repo/wiki.go and internal/route/repo/view.go where the pages try to recover commit information. If errors are returned while recovering commit information, the page will return a 500 error and stop rendering, resulting in a denial of service.
In view.go the issue occurs at line 56 while a slightly different issue occurs in wiki.go at line 174 where commits[0] is dereferenced without checking if it contains value.
It is possible to trigger issues in assigning the correct value to variable commits by using a specific string as part of the page title.
The issue is linked to the fact that file names can contain special characters such as *, ?, [, ], etc. that will be interpreted as git's pathspec instead of a simple string. So crafting a name containing an incomplete pathspec sequence will trigger this error.
PoC
As a proof of concept consider the file name "[] and how it affects repository and wiki pages.
In the following images it is shown how pages are created, the error shown in the web page right after creation and the error as logged in the console.
Figure 1: Creation of malicious file in repository
<img width="832" height="692" alt="repo_error_web" src="https://github.com/user-attachments/assets/53c57366-8f45-4a0f-a2ac-86f4a08467cc" />Figure 2: Malicious file in repository causes error 500
<img width="934" height="56" alt="repo_error_console" src="https://github.com/user-attachments/assets/26427fc3-bead-4e41-a484-e2d53289a2da" />Figure 3: Console error caused by malicious file in repository
<img width="835" height="503" alt="wiki_creation" src="https://github.com/user-attachments/assets/7a5c9836-64e3-4824-b6e5-9f9a80e7f18a" />Figure 4: Creation of malicious file in wiki
<img width="1001" height="463" alt="wiki_error_web" src="https://github.com/user-attachments/assets/33c5a907-b81c-4157-bd37-33341412172a" />Figure 5: Malicious file in wiki causes error 500
<img width="1018" height="537" alt="wiki_error_console" src="https://github.com/user-attachments/assets/9b0ab551-5720-4715-a2ac-f7310534f025" />Figure 6: Console error caused by malicious file in wiki
Impact
The repository and wiki pages will not render when files named with the payload are present in the repository or in the wiki. This condition will be present as long as the malicious file is present in the repository or wiki. The issue will not cause a DoS condition when using the server via CLI.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | gogs.io/gogs | all versions | 0.14.3go get gogs.io/gogs@v0.14.3 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for gogs.io/gogs, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update gogs.io/gogs to 0.14.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-3qq3-668m-v9mj is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-3qq3-668m-v9mj can be triaged on real exposure rather than presence alone.
Tailored to GHSA-3qq3-668m-v9mj. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-3qq3-668m-v9mj in your dependencies?
O3 Security finds GHSA-3qq3-668m-v9mj across Go dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.