Summary
AIOHTTP: Out-of-bounds heap read in C HTTP response parser error path (malformed chunked response)
An out-of-bounds heap read could occur in the C response parser while building an error message for a malformed response.
Workaround
If unable to upgrade, the Python parser is unaffected and can be used with AIOHTTP_NO_EXTENSIONS=1.
Patch: https://github.com/aio-libs/aiohttp/commit/49f65d54150397892f7bcc4aae887767d51c322d
Impact
An attacker controlled server, or possibly an accidental response could trigger a DoS in the client.
A read operation accesses a memory location beyond the intended buffer boundary. Typical impact: sensitive data disclosure or crash.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
Already deployed Kodem?
See it in your environmentNew to Kodem? Get a demo →Remediation advice
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
Frequently Asked Questions
- What is CVE-2026-69244? CVE-2026-69244 is a high-severity out-of-bounds read vulnerability in aiohttp (pip), affecting versions <= 3.14.2. It is fixed in 3.14.3. A read operation accesses a memory location beyond the intended buffer boundary.
- Which versions of aiohttp are affected by CVE-2026-69244? aiohttp (pip) versions <= 3.14.2 is affected.
- Is there a fix for CVE-2026-69244? Yes. CVE-2026-69244 is fixed in 3.14.3. Upgrade to this version or later.
- Is CVE-2026-69244 exploitable, and should I be worried? Whether CVE-2026-69244 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2026-69244 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2026-69244? Upgrade
aiohttpto 3.14.3 or later.