GHSA-6jhg-hg63-jvvf — aiohttp
Fix: aio-libs/aiohttp@b7dbd35GHSA-6jhg-hg63-jvvf is a CWE-770 vulnerability in aiohttp. A fix is available for aiohttp — see the affected versions and patch details below.
AIOHTTP vulnerable to denial of service through large payloads
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- 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-6jhg-hg63-jvvf.
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.
Real-World Exposure
aiohttpReal-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
A request can be crafted in such a way that an aiohttp server's memory fills up uncontrollably during processing.
Impact
If an application includes a handler that uses the Request.post() method, an attacker may be able to freeze the server by exhausting the memory.
Patch: https://github.com/aio-libs/aiohttp/commit/b7dbd35375aedbcd712cbae8ad513d56d11cce60
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | aiohttp | all versions | 3.13.3pip install --upgrade 'aiohttp==3.13.3' |
Detection & mitigation playbook
Open-source dependencyDetect
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 3.13.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-6jhg-hg63-jvvf 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-6jhg-hg63-jvvf can be triaged on real exposure rather than presence alone.
Tailored to GHSA-6jhg-hg63-jvvf. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
This vulnerability is rated Moderate for Red Hat products. A flaw in aiohttp allows a remote attacker to cause a Denial of Service (DoS) by sending a specially crafted POST request to an aiohttp server that utilizes the `Request.post()` method. This can lead to uncontrolled memory consumption, freezing the server and…
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat AI Inference Server 3.2 | rhaiis/vllm-cuda-rhel9:1774351144 | RHSA-2026:5809 |
| Red Hat AI Inference Server 3.2 | rhaiis/model-opt-cuda-rhel9:1774547384 | RHSA-2026:6761 |
| Red Hat AI Inference Server 3.2 | rhaiis/vllm-rocm-rhel9:1775252598 | RHSA-2026:6762 |
| Red Hat Ansible Automation Platform 2.18 | ansible-automation-platform/ee-minimal-rhel8:1786971288 | RHSA-2026:55853 |
| Red Hat Ansible Automation Platform 2.18 | ansible-automation-platform/ee-minimal-rhel9:1786942232 | RHSA-2026:55852 |
| Red Hat Ansible Automation Platform 2.6 | ansible-automation-platform-26/lightspeed-chatbot-rhel9:1777398576 | RHSA-2026:13545 |
| Red Hat Ansible Automation Platform 2.6 | ansible-automation-platform-26/lightspeed-rhel9:1787244079 | RHSA-2026:59155 |
| Red Hat Migration Toolkit 1.8 | rhmtc/openshift-migration-hook-runner-rhel8:1783931722 | RHSA-2026:41928 |
Frequently Asked Questions
Is GHSA-6jhg-hg63-jvvf in your dependencies?
O3 Security finds GHSA-6jhg-hg63-jvvf across PyPI dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.