CVE-2020-27619

CRITICALNVD 9.89.8—

9.8

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

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 75.3%
KEV: Not listed

Published

October 22, 2020

Last Modified

November 21, 2024

Advisory Details (10)

Auto-updated May 26, 2026

Upstream fix merged — awaiting tagged release. Sources: github_commit.

generic

[SECURITY] Fedora 34 Update: python2.7-2.7.18-11.fc34 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RSLQD5CCM75IZGAMBDGUZEATYU5YSGJ7/

generic

https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E

generic

https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E

generic

https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E

github_commit

commit e912e945f296 (python/cpython)

Fix landed in python/cpython commit e912e945f296 — awaiting tagged release

https://github.com/python/cpython/commit/e912e945f2960029d039d3390ea08835ad39374b

github_commit

commit b664a1df4ee7 (python/cpython)

Fix landed in python/cpython commit b664a1df4ee7 — awaiting tagged release

https://github.com/python/cpython/commit/b664a1df4ee71d3760ab937653b10997081b1794

github_commit

commit 6c6c256df363 (python/cpython)

Fix landed in python/cpython commit 6c6c256df363 — awaiting tagged release

https://github.com/python/cpython/commit/6c6c256df3636ff6f6136820afaefa5a10a3ac33

github_commit

commit 43e523103886 (python/cpython)

Fix landed in python/cpython commit 43e523103886 — awaiting tagged release

https://github.com/python/cpython/commit/43e523103886af66d6c27cd72431b5d9d14cd2a9

github_commit

commit 2ef5caa58feb (python/cpython)

Fix landed in python/cpython commit 2ef5caa58feb — awaiting tagged release

https://github.com/python/cpython/commit/2ef5caa58febc8968e670e39e3d37cf8eef3cab8

generic

Issue 41944: [security][CVE-2020-27619] Python testsuite calls eval() on content received via HTTP - Python tracker

https://bugs.python.org/issue41944

Patch Availability(8)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	python3.5-venv (3.5.2-2ubuntu0~16.04.13+esm13) @ xenial	2026-05-23	ubuntu
ubuntu	python3.5-venv (3.5.2-2ubuntu0~16.04.13) @ xenial	2026-05-23	ubuntu
ubuntu	python2.7-minimal (2.7.18-1~20.04.1) @ focal	2026-05-23	ubuntu
redhat	python38-devel:3.8-8050020210811101222.e3d35cca	2021-11-09	redhat
redhat	python27:2.7-8050020210811095446.3e7ace8b	2021-11-09	redhat
redhat	rh-python38-python-urllib3-0:1.25.7-7.el7	2021-08-24	redhat
redhat	python27-python-pygments-0:1.5-5.el7	2021-08-24	redhat
redhat	python3-0:3.6.8-37.el8	2021-05-18	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

All Vendor Advisories

(9)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:15 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 14:30 UTCOSV refresh
2026-06-06 13:46 UTCEPSS rescore
2026-06-06 13:45 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore

Frequently asked(5)

What is CVE-2020-27619?

CVE-2020-27619 is a critical vulnerability published on October 22, 2020. In Python 3 through 3.9.0, the Lib/test/multibytecodec_support.py CJK codec tests call eval() on content retrieved via HTTP.

When was CVE-2020-27619 disclosed?

CVE-2020-27619 was first published in the National Vulnerability Database on October 22, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-27619 actively exploited?

CVE-2020-27619 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 75.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

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

CVE-2020-27619 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2020-27619?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-27619, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-27619

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CVE-2020-27619

📅 Published

🔄 Last Modified

📋 Advisory Details (10)

[SECURITY] Fedora 34 Update: python2.7-2.7.18-11.fc34 - package-announce - Fedora mailing-lists

commit e912e945f296 (python/cpython)

commit b664a1df4ee7 (python/cpython)

commit 6c6c256df363 (python/cpython)

commit 43e523103886 (python/cpython)

commit 2ef5caa58feb (python/cpython)

Issue 41944: [security][CVE-2020-27619] Python testsuite calls eval() on content received via HTTP - Python tracker

Patch Availability(8)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2020-27619?

Published

Last Modified

Advisory Details (10)

Frequently asked(5)