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CRITICAL

CVE-2020-10108

CVSS v3

9.8

CRITICAL

EPSS Score

4.0 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • twistedPyPIall versions · fixed in 20.3.0rc1

Vendor advisories

  • CVE-2020-10108 Red Hat Product Security22 products fixed · 11 known affected

    python-twisted: HTTP request smuggling when presented with two Content-Length headers

    calamari-server as a component of Red Hat Ceph Storage 2 · calamari-server.src as a component of Red Hat Ceph Storage 2 · python3-twisted as a component of Red Hat OpenShift Container Platform 4

  • RHSA-2020:1962 Red Hat Product Security11 products fixed

    Red Hat Security Advisory: python-twisted-web security update

  • RHSA-2020:1561 Red Hat Product Security11 products fixed

    Red Hat Security Advisory: python-twisted-web security update

Full record on NVD

Description

In Twisted Web through 19.10.0, there was an HTTP request splitting vulnerability. When presented with two content-length headers, it ignored the first header. When the second content-length value was set to zero, the request body was interpreted as a pipelined request.

Technical details

Published
2020-03-12

Frequently asked questions

What is CVE-2020-10108?

In Twisted Web through 19.10.0, there was an HTTP request splitting vulnerability. When presented with two content-length headers, it ignored the first header. When the second content-length value was set to zero, the request body was interpreted as a pipelined request.

Is CVE-2020-10108 actively exploited?

Active exploitation of CVE-2020-10108 has not been confirmed. Its EPSS score was 4.0% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-10108?

CVE-2020-10108 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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