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CRITICAL severity

CVE-2021-21278 — rsshub

CRITICALFix: DIYgod/RSSHub@7f1c430

CVE-2021-21278 is a critical-severity (CVSS 9.8) CWE-74 vulnerability in rsshub. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Risk of code injection

Also known asGHSA-pgjj-866w-fc5c
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
None indexed
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.6%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs76th percentile — riskier than 76% of all scored CVEsHighest risk
0.00%0.70%1.39%2.09%0.5%1.6%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

1other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
rsshubnpm
27Kdownloads / week

Description

Impact

Some routes use eval or Function constructor, which may be injected by the target site with unsafe code, causing server-side security issues

Patches

Temporarily removed the problematic route and added a no-new-func rule to eslint Self-built users should upgrade to 7f1c430 and later as soon as possible

Credits

Tencent Woodpecker Security Team

For more information

If you have any questions or comments about this advisory:

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
📦npmrsshuball versionsNo fix

Affected Products

1 product · 1 configurations
Application
rsshubrsshub
< 2021-01-25
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for rsshub, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of rsshub for CVE-2021-21278. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    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.

Frequently Asked Questions

### Impact Some routes use `eval` or `Function constructor`, which may be injected by the target site with unsafe code, causing server-side security issues ### Patches Temporarily removed the problematic route and added a `no-new-func` rule to eslint Self-built users should upgrade to 7f1c430 and later as soon as possible ### Credits Tencent Woodpecker Security Team ### For more information If you have any questions or comments about this advisory: * Open an issue in [https://github.com/DIYgod/RSSHub/issues](https://github.com/DIYgod/RSSHub/issues) * Email us at [[email protected]](mailto:i@diygo
O3 Security · Impact-Aware SCA

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CVE-2021-21278: rsshub: Risk of code injection