CVE-2026-74835Network attack vectorHinoki check available

Memory exhaustion via deferred chunk-size enforcement

Published Sep 1, 2026 · Updated Sep 1, 2026

Denial of service in Erlang/OTP inets httpd allows remote attackers to exhaust server memory via a chunked HTTP request body. During chunked reception, httpd buffers each partial chunk and checks max_body_size only after the chunk completes, allowing unbounded accumulation. Exploitation requires an exposed httpd instance with a finite max_body_size setting; one unauthenticated connection can exhaust node memory and interrupt service.

CVSS severity8.7
High
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

Denial of service in Erlang/OTP inets httpd allows remote attackers to exhaust server memory via a chunked HTTP request body. During chunked reception, httpd buffers each partial chunk and checks max_body_size only after the chunk completes, allowing unbounded accumulation. Exploitation requires an exposed httpd instance with a finite max_body_size setting; one unauthenticated connection can exhaust node memory and interrupt service.

The record

CVE
CVE-2026-74835
Published
Sep 1, 2026
Updated
Sep 1, 2026
Vendor
Erlang
Product
Erlang/OTP
Classifications
CWE-770, CAPEC-469, CAPEC-130, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=17.0 <27.3.4.17
  2. Affected versionversion=28.0 <28.5.0.6
  3. Affected versionversion=29.0 <29.0.6
  4. Affected versionversion=5.10 <9.3.2.7
  5. Affected versionversion=84adefa331c4159d432d22840663c38f155cd4c1 <* changes=[{"at":"0bceff0c2987cae83d9d4a77c5ecacd6d01b8b86","status":"unaffected"},{"at":"8e1ca42b64df6c41306affbe8dc129bdbd4042c7","status":"unaffected"},{"at":"7f9c460d1818c2afb78fbd01f8d8b81343bbb011","status":"unaffected"}]
  6. Affected versionversion=9.4 <9.6.2.3
  7. Affected versionversion=9.7 <9.7.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Erlang · Erlang/OTPversion=17.0 <27.3.4.17; version=28.0 <28.5.0.6; version=29.0 <29.0.6; version=5.10 <9.3.2.7; version=84adefa331c4159d432d22840663c38f155cd4c1 <* changes=[{"at":"0bceff0c2987cae83d9d4a77c5ecacd6d01b8b86","status":"unaffected"},{"at":"8e1ca42b64df6c41306affbe8dc129bdbd4042c7","status":"unaffected"},{"at":"7f9c460d1818c2afb78fbd01f8d8b81343bbb011","status":"unaffected"}]; version=9.4 <9.6.2.3; version=9.7 <9.7.2

Published CVSS scores

8.7Erlang Ecosystem FoundationCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
CAPEC-469HTTP DoS
CAPEC-130Excessive Allocation
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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