CVE & CISA-KEV Catalog

CVE-2020-26116

HIGHEPSS 93th pctl
7.2
CVSS v3
NVD

Description

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.

How to fix

Remediation Available
pypy3Debian
Fixed in:7.3.3+dfsg-1CVE-2020-26116
Fixed in:7.3.3+dfsg-1CVE-2020-26116
Fixed in:7.3.3+dfsg-1CVE-2020-26116
Fixed in:7.3.3+dfsg-1CVE-2020-26116
python2.7Ubuntu
Fixed in:2.7.6-8ubuntu0.6+esm7USN-4581-1
Fixed in:2.7.12-1ubuntu0~16.04.13USN-4581-1
Fixed in:2.7.17-1~18.04ubuntu1.2USN-4581-1
Fixed in:2.7.18-1~20.04.1USN-4754-3
python2.7-minimalUbuntu
Fixed in:2.7.6-8ubuntu0.6+esm7USN-4581-1
Fixed in:2.7.12-1ubuntu0~16.04.13USN-4581-1
Fixed in:2.7.17-1~18.04ubuntu1.2USN-4581-1
Fixed in:2.7.18-1~20.04.1USN-4754-3
python3.10Ubuntu
Fixed in:3.10.12-1~22.04.4USN-6891-1
python3.10-minimalUbuntu
Fixed in:3.10.12-1~22.04.4USN-6891-1
python3.11Ubuntu
Fixed in:3.11.0~rc1-1~22.04.1~esm1USN-6891-1
Fixed in:3.11.6-3ubuntu0.1USN-6891-1
python3.11-minimalUbuntu
Fixed in:3.11.0~rc1-1~22.04.1~esm1USN-6891-1
Fixed in:3.11.6-3ubuntu0.1USN-6891-1
python3.12Ubuntu
Fixed in:3.12.0-1ubuntu0.1USN-6891-1
python3.12-minimalUbuntu
Fixed in:3.12.0-1ubuntu0.1USN-6891-1
python3.4Ubuntu
Fixed in:3.4.3-1ubuntu1~14.04.7+esm8USN-4581-1
python3.4-minimalUbuntu
Fixed in:3.4.3-1ubuntu1~14.04.7+esm8USN-4581-1
python3.5Ubuntu
Fixed in:3.5.2-2ubuntu0~16.04.4~14.04.1+esm1USN-6891-1
Fixed in:3.5.2-2ubuntu0~16.04.12USN-4581-1
Fixed in:3.5.2-2ubuntu0~16.04.13+esm13USN-6891-1
python3.5-minimalUbuntu
Fixed in:3.5.2-2ubuntu0~16.04.4~14.04.1+esm1USN-6891-1
Fixed in:3.5.2-2ubuntu0~16.04.12USN-4581-1
Fixed in:3.5.2-2ubuntu0~16.04.13+esm13USN-6891-1
python3.6Ubuntu
Fixed in:3.6.9-1~18.04ubuntu1.3USN-4581-1
Fixed in:3.6.9-1~18.04ubuntu1.13+esm2USN-6891-1
python3.6-minimalUbuntu
Fixed in:3.6.9-1~18.04ubuntu1.3USN-4581-1
Fixed in:3.6.9-1~18.04ubuntu1.13+esm2USN-6891-1
python3.7Ubuntu
Fixed in:3.7.5-2ubuntu1~18.04.2+esm3USN-6891-1
Fixed in:3.7.5-2~18.04.4USN-4754-3
python3.7-minimalUbuntu
Fixed in:3.7.5-2ubuntu1~18.04.2+esm3USN-6891-1
Fixed in:3.7.5-2~18.04.4USN-4754-3
python3.8Ubuntu
Fixed in:3.8.0-3~18.04.1USN-4754-3
Fixed in:3.8.0-3ubuntu1~18.04.2+esm2USN-6891-1
Fixed in:3.8.10-0ubuntu1~20.04.10USN-6891-1
python3.8-minimalUbuntu
Fixed in:3.8.0-3~18.04.1USN-4754-3
Fixed in:3.8.0-3ubuntu1~18.04.2+esm2USN-6891-1
Fixed in:3.8.10-0ubuntu1~20.04.10USN-6891-1
python3.9Ubuntu
Fixed in:3.9.5-3ubuntu0~20.04.1+esm2USN-6891-1
python3.9-minimalUbuntu
Fixed in:3.9.5-3ubuntu0~20.04.1+esm2USN-6891-1
Python 2Windows application
Affected:3.0.0 3.5.10Fixed in:3.5.10Python Software Foundation
Affected:3.8.0 3.8.5Fixed in:3.8.5Python Software Foundation
Affected:3.6.0 3.6.12Fixed in:3.6.12Python Software Foundation
Affected:3.7.0 3.7.9Fixed in:3.7.9Python Software Foundation
Python 3.10Windows application
Affected:3.0.0 3.5.10Fixed in:3.5.10Python Software Foundation
Affected:3.6.0 3.6.12Fixed in:3.6.12Python Software Foundation
Affected:3.7.0 3.7.9Fixed in:3.7.9Python Software Foundation
Affected:3.8.0 3.8.5Fixed in:3.8.5Python Software Foundation
Python 3.11Windows application
Affected:3.8.0 3.8.5Fixed in:3.8.5Python Software Foundation
Affected:3.7.0 3.7.9Fixed in:3.7.9Python Software Foundation
Affected:3.6.0 3.6.12Fixed in:3.6.12Python Software Foundation
Affected:3.0.0 3.5.10Fixed in:3.5.10Python Software Foundation
Python 3.12Windows application
Affected:3.0.0 3.5.10Fixed in:3.5.10Python Software Foundation
Affected:3.6.0 3.6.12Fixed in:3.6.12Python Software Foundation
Affected:3.7.0 3.7.9Fixed in:3.7.9Python Software Foundation
Affected:3.8.0 3.8.5Fixed in:3.8.5Python Software Foundation
Python 3.8Windows application
Affected:3.7.0 3.7.9Fixed in:3.7.9Python Software Foundation
Affected:3.0.0 3.5.10Fixed in:3.5.10Python Software Foundation
Affected:3.6.0 3.6.12Fixed in:3.6.12Python Software Foundation
Affected:3.8.0 3.8.5Fixed in:3.8.5Python Software Foundation
Python 3.9Windows application
Affected:3.7.0 3.7.9Fixed in:3.7.9Python Software Foundation
Affected:3.6.0 3.6.12Fixed in:3.6.12Python Software Foundation
Affected:3.8.0 3.8.5Fixed in:3.8.5Python Software Foundation
Affected:3.0.0 3.5.10Fixed in:3.5.10Python Software Foundation

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeChanged

Impact

ConfidentialityLow
IntegrityLow
AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Exploit Intelligence

6.42%probability of exploitation in 30 days
93rdpercentile

High risk: more likely to be exploited than 93% of all known CVEs.

References

Related Vulnerabilities

Other CWE-74 (Injection) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2013-2251Critical9.8100%KEVFix
CVE-2023-22527Critical9.8100%KEV + RansomFix
CVE-2019-2725Critical9.8100%KEV + RansomFix
CVE-2022-46169Critical9.8100%KEVFix
CVE-2022-35914Critical9.8100%KEV-
CVE-2019-17558High7.599%KEVFix
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.