# CVE-2022-31110: Denial of Service (DoS) vulnerability in RSSHub

> Attackers can cause high CPU usage and denial of service in RSSHub by passing special values to filter parameters.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 Jun 2022
- **Updated:** 22 Apr 2025
- **Also known as:** GHSA-jvxx-v45p-v5vf

## What is CVE-2022-31110?

CVE-2022-31110 is a medium-severity denial of service vulnerability in DIYgod RSSHub, published on 29 Jun 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

RSSHub is an open source, extensible RSS feed generator. In commits prior to 5c4177441417 passing some special values to the `filter` and `filterout` parameters can cause an abnormally high CPU. This results in an impact on the performance of the servers and RSSHub services which may lead to a denial of service. This issue has been fixed in commit 5c4177441417 and all users are advised to upgrade. There are no known workarounds for this issue.

Weakness: CWE-1333 (Inefficient Regular Expression Complexity), CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2022-31110?

2 open source packages ship an affected version, including rsshub. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `rsshub` | npm | All versions to 1.0.0 | None |
| `rsshub` | npm | All versions to 1.0.0 | None |

Products: Rsshub Rsshub.

## How do I fix CVE-2022-31110?

No fix has been published for CVE-2022-31110 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-31110 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-31110 exists.

## Other vulnerabilities in DIYgod RSSHub

- [CVE-2023-22493](https://insights.sbomify.com/CVE-2023-22493/): RSSHub is vulnerable to SSRF (Server-Side Request Forgery) (high 8.8)
- [CVE-2021-21278](https://insights.sbomify.com/CVE-2021-21278/): Risk of code injection in RSSHub (high 8.6)
- [CVE-2024-27927](https://insights.sbomify.com/CVE-2024-27927/): RSSHub vulnerable to SSRF in /mastodon, /zjoi, and /m4 (medium 6.5)
- [CVE-2024-27926](https://insights.sbomify.com/CVE-2024-27926/): RSSHub Cross-site Scripting vulnerability caused by internal media proxy (medium 6.1)
- [CVE-2023-26491](https://insights.sbomify.com/CVE-2023-26491/): RSSHub is vulnerable to cross-site scripting (XSS) via unvalidated URL parameters (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-31110 and fix it if it is affected.

What it is: CVE-2022-31110 is a medium-severity denial of service vulnerability in DIYgod RSSHub, published on 29 Jun 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-31110 exists.

Affected packages and fixed versions:
- rsshub (npm): affected all versions up to 1.0.0; no fix listed
- rsshub (npm): affected all versions up to 1.0.0; no fix listed

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2022-31110/ (Markdown: https://insights.sbomify.com/CVE-2022-31110/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-31110
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-31110
- OSV: https://osv.dev/vulnerability/CVE-2022-31110

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-31110/
Summaries are generated and may contain mistakes; the official description above is the record.