CVE-2026-34513
HIGHCVSS 7.5/10EPSS 0.44%
Last modified
CVE-2026-34513 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, an unbounded DNS cache could result in excessive memory usage possibly resulting in a DoS situation. EPSS estimates a 0.44% chance of exploitation in the next 30 days.
Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, an unbounded DNS cache could result in excessive memory usage possibly resulting in a DoS situation. This issue has been patched in version 3.13.4.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Aiohttp | Aiohttp | < 3.13.4 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-34513?
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, an unbounded DNS cache could result in excessive memory usage possibly resulting in a DoS situation. This issue has been patched in version 3.13.4.
How severe is CVE-2026-34513?
CVE-2026-34513 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.
How do I fix CVE-2026-34513?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-34507OpenClaw before 2026.4.29 contains a policy bypass vulnerabi…5.4
- CVE-2026-34508Rejected reason: This CVE ID has been rejected or withdrawn …
- CVE-2026-34509Rejected reason: This CVE ID has been rejected or withdrawn …
- CVE-2026-34510OpenClaw before 2026.3.22 contains a path traversal vulnerab…6.9
- CVE-2026-34511OpenClaw before 2026.4.2 reuses the PKCE verifier as the OAu…5.9
- CVE-2026-34512OpenClaw before 2026.3.25 contains an improper access contro…8.1
- CVE-2026-34514AIOHTTP is an asynchronous HTTP client/server framework for …5.3
- CVE-2026-34515AIOHTTP is an asynchronous HTTP client/server framework for …7.5
- CVE-2026-34516AIOHTTP is an asynchronous HTTP client/server framework for …7.5
- CVE-2026-34517AIOHTTP is an asynchronous HTTP client/server framework for …5.3
- CVE-2026-34518AIOHTTP is an asynchronous HTTP client/server framework for …5.3
- CVE-2026-34519AIOHTTP is an asynchronous HTTP client/server framework for …5.3
Are you affected by CVE-2026-34513?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST