CVE-2020-7670Public exploitNetwork attack vector

Request smuggling via conflicting HTTP framing headers

Published Jun 10, 2020 · Updated Aug 4, 2024

HTTP request smuggling in Peter Ohler Agoo before 2.14.0 allows remote attackers to poison proxied requests via conflicting framing headers. The HTTP parser accepts duplicate Content-Length fields and malformed Transfer-Encoding syntax, causing a frontend proxy and Agoo to disagree about request boundaries. Exploitation requires Agoo to run behind a frontend proxy with compatible parsing behavior; GitHub withdrew its advisory after the maintainer disputed that the demonstrated behavior constituted a vulnerability.

CVSS severity7.5
High
EPSS probability1.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTTP request smuggling in Peter Ohler Agoo before 2.14.0 allows remote attackers to poison proxied requests via conflicting framing headers. The HTTP parser accepts duplicate Content-Length fields and malformed Transfer-Encoding syntax, causing a frontend proxy and Agoo to disagree about request boundaries. Exploitation requires Agoo to run behind a frontend proxy with compatible parsing behavior; GitHub withdrew its advisory after the maintainer disputed that the demonstrated behavior constituted a vulnerability.

The record

CVE
CVE-2020-7670
Published
Jun 10, 2020
Updated
Aug 4, 2024
Vendor
Peter Ohler
Product
Agoo
Classifications
CWE-444, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 10, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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=versions prior to 2.14.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Peter Ohler · Agooversion=versions prior to 2.14.0

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A: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 exploitPublished

Weakness, pattern, technique

CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
T1190Exploit Public-Facing Application

Public exploit references

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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