How severe is GHSA-pjjw-qhg8-p2p9?

No CVSS score has been assigned to GHSA-pjjw-qhg8-p2p9 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-pjjw-qhg8-p2p9?

GHSA-pjjw-qhg8-p2p9 affects the following packages: aiohttp (PyPI). Ecosystems affected: PyPI.

How do I fix GHSA-pjjw-qhg8-p2p9?

Update aiohttp to 3.8.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-pjjw-qhg8-p2p9 is resolved across your whole dependency graph.

How do I detect GHSA-pjjw-qhg8-p2p9 in my PyPI dependencies?

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

How do I mitigate GHSA-pjjw-qhg8-p2p9 if there is no patch (or I can't update yet)?

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.

Is GHSA-pjjw-qhg8-p2p9 actively exploited in the wild?

No public exploit code has been indexed for GHSA-pjjw-qhg8-p2p9 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was GHSA-pjjw-qhg8-p2p9 published, and has it been updated?

GHSA-pjjw-qhg8-p2p9 was published on November 27, 2023 and was last updated on September 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐍 PyPI

Not in CISA KEV

aiohttp has vulnerable dependency that is vulnerable to request smugglingGHSA-pjjw-qhg8-p2p9

Fix: aio-libs/aiohttp@996de26

GHSA-pjjw-qhg8-p2p9 is a security vulnerability in aiohttp. A fix is available for aiohttp — see the affected versions and patch details below.

Published

Nov 27, 2023

Updated

Sep 10, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Sep 10, 2026 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

🐍aiohttp

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

Summary

llhttp 8.1.1 is vulnerable to two request smuggling vulnerabilities. Details have not been disclosed yet, so refer to llhttp for future information. The issue is resolved by using llhttp 9+ (which is included in aiohttp 3.8.6+).

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`aiohttp`	all versions	3.8.6`pip install --upgrade 'aiohttp==3.8.6'`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for aiohttp, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update aiohttp to 3.8.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-pjjw-qhg8-p2p9 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.

Frequently Asked Questions

### Summary llhttp 8.1.1 is vulnerable to two request smuggling vulnerabilities. Details have not been disclosed yet, so refer to llhttp for future information. The issue is resolved by using llhttp 9+ (which is included in aiohttp 3.8.6+).

O3 Security · Impact-Aware SCA

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