No exploitation reportedFix available

CVE-2020-27619

Q: Is CVE-2020-27619 actively exploited?

Active exploitation of CVE-2020-27619 has not been confirmed. Its EPSS score was 8.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2020-27619?

CVE-2020-27619 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2020-10-22
Fixed in3.9.1 · 3.8.7 · 3.7.10 · 3.6.13

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

In Python 3 through 3.9.0, the Lib/test/multibytecodec_support.py CJK codec tests call eval() on content retrieved via HTTP.

Timeline

dates in UTC

2020-10-2203:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-27619?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-27619?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Python

Branch	Affected	Fixed in	Source
3.9	≥ 3.9.0, < 3.9.1	3.9.1	NVD · OSV
3.8	≥ 3.8.0, < 3.8.7	3.8.7	NVD · OSV
3.7	≥ 3.7.0, < 3.7.10	3.7.10	NVD · OSV
3.x	≥ 3.0.0, < 3.6.13	3.6.13	NVD · OSV

Fedoraproject fedora

Branch	Affected	Fixed in	Source
33.x	= 33	no fix published	NVD
34.x	= 34	no fix published	NVD

Oracle communications cloud native core network function cloud native environment

Branch	Affected	Fixed in	Source
22.2	= 22.2.0	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

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

babelAlmaLinux:8all versions · fixed in 2.5.1-10.module_el8.6.0+2781+fed64c13and 1 other package
python-nose-docsAlmaLinux:8all versions · fixed in 1.3.7-31.module_el8.5.0+2569+5c5719bc
python-sqlalchemy-docAlmaLinux:8all versions · fixed in 1.3.2-2.module_el8.5.0+2569+5c5719bc
python2-attrsAlmaLinux:8all versions · fixed in 17.4.0-10.module_el8.6.0+2781+fed64c13
python2-backportsAlmaLinux:8all versions · fixed in 1.0-16.module_el8.6.0+2781+fed64c13
python2-backports-ssl_match_hostnameAlmaLinux:8all versions · fixed in 3.5.0.1-12.module_el8.6.0+2781+fed64c13
python2-chardetAlmaLinux:8all versions · fixed in 3.0.4-10.module_el8.6.0+2781+fed64c13
python2-coverageAlmaLinux:8all versions · fixed in 4.5.1-4.module_el8.6.0+2781+fed64c13

33 more package ranges on OSV.dev

Full record on NVD

Fix

Update Python to 3.9.1 · 3.8.7 · 3.7.10 · 3.6.13

Advisories and patches

bugs.python.orgPatch · Vendor Advisory
github.comPatch · Vendor Advisory
github.comPatch · Vendor Advisory
github.comPatch · Vendor Advisory
github.comPatch · Vendor Advisory
github.comPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2026-10-08
OpenCVESSVC decisionnone—
NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
FIRST EPSSEPSS score8.3 %2026-10-22
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2020-10-22
Last Modified: 2026-10-08
NVD status: Modified

Frequently asked questions

What is CVE-2020-27619?

In Python 3 through 3.9.0, the Lib/test/multibytecodec_support.py CJK codec tests call eval() on content retrieved via HTTP.

Is CVE-2020-27619 actively exploited?

Active exploitation of CVE-2020-27619 has not been confirmed. Its EPSS score was 8.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-27619?

CVE-2020-27619 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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