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TI-2020-15959 Aliases CVE-2020-26116GHSA-w7gf-rpqw-gx4f

http.client in Python 3.x before 3.5.10, 3.6.x before 3.6.12, 3.7.x before 3.7.9, and…

Priority MEDIUM 47CWE-74Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
Partial Red Hat: 17 fixed, 4 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

http.client in Python 3.x before 3.5.10, 3.6.x before 3.6.12, 3.7.x before 3.7.9, and 3.8.x before 3.8.5 allows CRLF injection if the attacker controls the HTTP request method, as demonstrated by inserting CR and LF control characters in the first argument of HTTPConnection.request.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.06358 93rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 8 advisoriesRed Hat: 17 fixed, 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 14

CPEVersionsRoleVendor
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*3.0.0 to before 3.5.10; 3.6.0 to before 3.6.12; 3.7.0 to before 3.7.9; 3.8.0 to before 3.8.5Vulnerablepython-pillow
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*31VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*32VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*33VulnerableFedoraproject
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*12.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*14.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:*not specified by NVDRunning onNetApp
  • cpe:2.3:a:python:python:*:*:*:*:*:*:*:* Versions 3.0.0 to before 3.5.10; 3.6.0 to before 3.6.12; 3.7.0 to before 3.7.9; 3.8.0 to before 3.8.5 Vulnerable ·python-pillow
  • cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
  • cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:* Versions 12.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
Show 4 more CPE
CPEVersionsRoleVendor
cpe:2.3:h:netapp:hci_storage_node:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*8.8VulnerableOracle
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*15.1VulnerableopenSUSE
  • cpe:2.3:h:netapp:hci_storage_node:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:* Versions 8.8 Vulnerable ·Oracle
  • cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE

Remediation

Red Hat 8 advisories

  • RHSA-2022:5235 Released 2022-06-28 · Red Hat rating Moderate
    python security update
    • Red Hat Enterprise Linux Client (v. 7) python-2.7.5-92.el7_9, python-libs-2.7.5-92.el7_9
    • Red Hat Enterprise Linux Client Optional (v. 7) python-debug-2.7.5-92.el7_9, python-devel-2.7.5-92.el7_9, python-test-2.7.5-92.el7_9 +2
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) python-debug-2.7.5-92.el7_9, python-test-2.7.5-92.el7_9, python-tools-2.7.5-92.el7_9 +1
    • Red Hat Enterprise Linux Server (v. 7) python-2.7.5-92.el7_9, python-devel-2.7.5-92.el7_9, python-libs-2.7.5-92.el7_9 +1
    • Red Hat Enterprise Linux Server Optional (v. 7) python-debug-2.7.5-92.el7_9, python-test-2.7.5-92.el7_9, python-tools-2.7.5-92.el7_9 +1
    • Red Hat Enterprise Linux Workstation (v. 7) python-2.7.5-92.el7_9, python-devel-2.7.5-92.el7_9, python-libs-2.7.5-92.el7_9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) python-debug-2.7.5-92.el7_9, python-test-2.7.5-92.el7_9, python-tools-2.7.5-92.el7_9 +1
  • RHSA-2021:3366 Released 2021-08-31 · Red Hat rating Moderate
    python3 security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) platform-python-3.6.8-24.el8_2, platform-python-debug-3.6.8-24.el8_2, platform-python-devel-3.6.8-24.el8_2 +3
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) platform-python-3.6.8-24.el8_2, python3-3.6.8-24.el8_2, python3-libs-3.6.8-24.el8_2 +1
  • RHSA-2021:1633 Released 2021-05-18 · Red Hat rating Moderate
    python3 security update
    • Red Hat Enterprise Linux AppStream (v. 8) platform-python-3.6.8-37.el8, platform-python-debug-3.6.8-37.el8, platform-python-devel-3.6.8-37.el8 +3
    • Red Hat Enterprise Linux BaseOS (v. 8) platform-python-3.6.8-37.el8, python3-3.6.8-37.el8, python3-libs-3.6.8-37.el8 +1
Show 5 more Red Hat advisories
  • RHSA-2021:1879 Released 2021-05-18 · Red Hat rating Moderate
    python38:3.8 security update
    • Red Hat Enterprise Linux AppStream (v. 8) Cython-0.29.14-4.module+el8.4.0+8888+89bc7e79.src::python38:3.8, PyYAML-5.3.1-1.module+el8.4.0+8888+89bc7e79.src::python38:3.8, babel-2.7.0-10.module+el8.4.0+8888+89bc7e79.src::python38:3.8 +47
  • RHSA-2021:1761 Released 2021-05-18 · Red Hat rating Moderate
    python27:2.7 security and bug fix update
    • Red Hat Enterprise Linux AppStream (v. 8) Cython-0.28.1-7.module+el8.1.0+3111+de3f2d8e.src::python27:2.7, PyYAML-3.12-16.module+el8.1.0+3111+de3f2d8e.src::python27:2.7, babel-2.5.1-9.module+el8.1.0+3111+de3f2d8e.noarch::python27:2.7 +47
  • RHSA-2020:4299 Released 2020-10-20 · Red Hat rating Moderate
    rh-python38 security, bug fix, and enhancement update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-python38-python-3.8.6-1.el7, rh-python38-python-debug-3.8.6-1.el7, rh-python38-python-devel-3.8.6-1.el7 +8
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-python38-python-3.8.6-1.el7, rh-python38-python-debug-3.8.6-1.el7, rh-python38-python-devel-3.8.6-1.el7 +8
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) rh-python38-python-3.8.6-1.el7, rh-python38-python-debug-3.8.6-1.el7, rh-python38-python-devel-3.8.6-1.el7 +8
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-python38-python-3.8.6-1.el7, rh-python38-python-debug-3.8.6-1.el7, rh-python38-python-devel-3.8.6-1.el7 +8
  • RHSA-2020:4273 Released 2020-10-20 · Red Hat rating Moderate
    python27 security, bug fix, and enhancement update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) python27-python-2.7.18-2.el7, python27-python-debug-2.7.18-2.el7, python27-python-devel-2.7.18-2.el7 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) python27-python-2.7.18-2.el7, python27-python-debug-2.7.18-2.el7, python27-python-devel-2.7.18-2.el7 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) python27-python-2.7.18-2.el7, python27-python-debug-2.7.18-2.el7, python27-python-devel-2.7.18-2.el7 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) python27-python-2.7.18-2.el7, python27-python-debug-2.7.18-2.el7, python27-python-devel-2.7.18-2.el7 +6
  • RHSA-2020:4285 Released 2020-10-19 · Red Hat rating Moderate
    rh-python36 security, bug fix, and enhancement update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) rh-python36-python-3.6.12-1.el6, rh-python36-python-debug-3.6.12-1.el6, rh-python36-python-devel-3.6.12-1.el6 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-python36-python-3.6.12-1.el7, rh-python36-python-debug-3.6.12-1.el7, rh-python36-python-devel-3.6.12-1.el7 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-python36-python-3.6.12-1.el7, rh-python36-python-debug-3.6.12-1.el7, rh-python36-python-devel-3.6.12-1.el7 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) rh-python36-python-3.6.12-1.el7, rh-python36-python-debug-3.6.12-1.el7, rh-python36-python-devel-3.6.12-1.el7 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) rh-python36-python-3.6.12-1.el6, rh-python36-python-debug-3.6.12-1.el6, rh-python36-python-devel-3.6.12-1.el6 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-python36-python-3.6.12-1.el7, rh-python36-python-debug-3.6.12-1.el7, rh-python36-python-devel-3.6.12-1.el7 +6

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Will not fix
Red Hat Quay 3AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2021:1633, RHSA-2021:1761, RHSA-2021:1879
Red Hat Enterprise Linux AppStream EUS (v. 8.2)Fixed RHSA-2021:3366
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2021:1633
Red Hat Enterprise Linux BaseOS EUS (v. 8.2)Fixed RHSA-2021:3366
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2022:5235
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2022:5235
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2022:5235
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2022:5235
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2022:5235
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2022:5235
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2022:5235
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2020:4285
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2020:4273, RHSA-2020:4285, RHSA-2020:4299
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6)Fixed RHSA-2020:4273, RHSA-2020:4285, RHSA-2020:4299
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7)Fixed RHSA-2020:4273, RHSA-2020:4285, RHSA-2020:4299
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2020:4285
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2020:4273, RHSA-2020:4285, RHSA-2020:4299
Not affected: 1 product
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-26116
  2. 2026-10-03 Alias added: GHSA-w7gf-rpqw-gx4f
  3. 2026-10-08 CISA SSVC decision points changed

References

Exploit 1

Patch 2

Advisory 10

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences