# CVE-2025-69223: aio-libs aiohttp denial of service via zip bomb in HTTP parser

Source: https://junglewise.ai/threats/cve-2025-69223-aio-libs-aiohttp-denial-of-service-via-zip-bomb-in-http-parser  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-01-05. Updated: 2026-06-30  
License: CC BY 4.0 with a link back

CVE-2025-69223 · Severity: high · CVSS 7.5 · Published 2026-01-05

AIOHTTP is a widely used Python library for building web servers and clients. A vulnerability in its request handling allows an attacker to send a specially crafted compressed file, known as a 'zip bomb,' which expands to an enormous size when processed. This can cause the server to run out of memory and crash, leading to a denial-of-service (DoS) that disrupts business operations and application availability.

Technologies: [aiohttp (PyPI)](https://junglewise.ai/threats/technologies/aiohttp). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2025-69223 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-69223 being exploited in the wild.

**How severe is CVE-2025-69223?** High severity, with a CVSS score of 7.5, published 5 January 2026.

**Which products and versions are affected?** aiohttp (PyPI) ECOSYSTEM:introduced=0,fixed=3.13.3.

**Is there a fix for CVE-2025-69223?** Yes. aiohttp (PyPI): upgrade to 3.13.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2025-69223 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2025-69223?** Check whether you run aiohttp (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- aiohttp (PyPI): upgrade to 3.13.3 or later

  ```sh
  pip install "aiohttp>=3.13.3"
  ```


## Technical details

AIOHTTP's HTTP parser contains a resource exhaustion vulnerability (CWE-409/CWE-770) in its 'auto_decompress' feature. The library fails to enforce strict output limits when decompressing incoming request data, allowing a remote, unauthenticated attacker to submit highly compressed payloads (zip bombs). When the server attempts to decompress these payloads, it consumes excessive RAM, leading to a crash or system instability. The fix, introduced in version 3.13.3, implements a default maximum output size of 32MiB per decompression call.

## Affected products

- aio-libs aiohttp <= 3.13.2
- Red Hat Ansible Automation Platform 2.4, 2.5
- Red Hat OpenShift AI 2.25.5

## Identifiers

- CVE-2025-69223
- GHSA-6mq8-rvhq-8wgg
- PYSEC-2026-1101

## Timeline

- 2026-01-03: patched: Fix committed to aiohttp repository
- 2026-01-05: disclosed: Security advisory published by aio-libs
- 2026-01-05: advisory: CVE-2025-69223 published

## References

- [https://github.com/aio-libs/aiohttp/commit/2b920c39002cee0ec5b402581779bbaaf7c9138a](https://github.com/aio-libs/aiohttp/commit/2b920c39002cee0ec5b402581779bbaaf7c9138a)
- [https://github.com/aio-libs/aiohttp/security/advisories/GHSA-6mq8-rvhq-8wgg](https://github.com/aio-libs/aiohttp/security/advisories/GHSA-6mq8-rvhq-8wgg)
- [https://access.redhat.com/errata/RHSA-2026:10184](https://access.redhat.com/errata/RHSA-2026:10184)
- [https://access.redhat.com/errata/RHSA-2026:1249](https://access.redhat.com/errata/RHSA-2026:1249)
- [https://access.redhat.com/errata/RHSA-2026:1497](https://access.redhat.com/errata/RHSA-2026:1497)
- [https://access.redhat.com/errata/RHSA-2026:1506](https://access.redhat.com/errata/RHSA-2026:1506)
- [https://access.redhat.com/errata/RHSA-2026:1596](https://access.redhat.com/errata/RHSA-2026:1596)

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