CVE-2026-74835: inets,httpd: Memory Exhaustion via Unenforced max_body_size During Chunked Body Reception
inets,httpd: Memory Exhaustion via Unenforced maxbodysize During Chunked Body Reception
Other sources
The inets application HTTP server httpd fails to enforce a configured body-size limit on chunked request.
— Launchpad
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 26.2.5.21-6 - Upgrade
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debian/erlangto a version that resolves this vulnerability.Fixed in 1:29.0.6+dfsg-1Fixed in 1:29.1.1+dfsg-1 - Upgrade
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Erlang/OTPto a version that resolves this vulnerability.Fixed in 27.3.4.17 - Upgrade
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Erlang/OTPto a version that resolves this vulnerability.Fixed in 28.5.0.6 - Upgrade
Upgrade
Erlang/OTPto a version that resolves this vulnerability.Fixed in 29.0.6
Event History
Frequently Asked Questions
Which deployments are exposed to this issue?
Deployments using the inets application HTTP server (httpd) in the affected OTP or inets version ranges are exposed. The issue applies when a body-size limit is configured, because chunked request bodies do not have that limit enforced.
What does an attacker need to do to trigger the problem?
An attacker needs to send an HTTP request using a chunked body to the affected httpd server. The server can continue receiving the body without enforcing the configured maximum body size, leading to memory exhaustion.
Are older releases known to be affected?
OTP releases before 17.0, corresponding to inets releases before 5.10, have an unknown affected status. They should not be assumed safe based on the available information.
Which releases contain the fix?
The fixed releases are OTP 27.3.4.17, OTP 28.5.0.6, and OTP 29.0.6, corresponding to inets 9.3.2.7, 9.6.2.3, and 9.7.2.