CVE-2019-9948

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-24. NVD baseline CVSS 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 12%CVSS: 9.1Exploit: NoneExposed: 0

A fix is available — apply it.

urllib in Python 2.x through 2.7.16 supports the local_file: scheme, which makes it easier for remote attackers to bypass protection mechanisms that blacklist file: URIs, as demonstrated by triggering a urllib.urlopen('local_file:///etc/passwd') call.

CVSS v3
9.1
EG Score
9.1(medium)
EPSS
95.8%
KEV
Not listed

Published

March 23, 2019

Last Modified

November 21, 2024

Advisory Details (8)

Auto-updated Jul 19, 2026
Patch available. Sources: redhat, github_pr.
github_pr

[2.7] bpo-35907: Avoid file reading as disallowing the unnecessary URL scheme in urllib (GH-11842)

Fix merged in python/cpython PR #11842 on 2019-05-21 — awaiting tagged release

https://github.com/python/cpython/pull/11842
generic

Issue 35907: [security][CVE-2019-9948] Unnecessary URL scheme exists to allow local_file:// reading file in urllib - Python tracker

https://bugs.python.org/issue35907
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2019:3520
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2019:3335
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2019:2030
redhat Patch Available
https://access.redhat.com/errata/RHSA-2019:1700
generic
http://www.securityfocus.com/bid/107549
generic

Packet Storm Security

http://packetstormsecurity.com/files/154927/Slackware-Security-Advisory-python-Updates.html

Vendor Advisories for CVE-2019-9948(8)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(12)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupython3.5-venv (3.5.2-2ubuntu0~16.04.8) @ xenial2026-05-27ubuntu
ubuntupython3.4-venv (3.4.3-1ubuntu1~14.04.7+esm2) @ trusty2026-05-27ubuntu
ubuntupython3.5-venv (3.5.2-2ubuntu0~16.04.13+esm13) @ xenial2026-05-27ubuntu
redhatpython-0:2.7.5-83.el7_62020-04-14redhat
redhatpython-0:2.7.5-63.el7_42020-04-07redhat
redhatpython-0:2.7.5-74.el7_52020-04-01redhat
redhatansible-tower-37/ansible-tower-memcached-rhel7:1.4.15-282020-02-18redhat
redhatrh-python36-python-0:3.6.9-2.el72019-11-06redhat
redhatpython27:2.7-8010020190903182548.51c94b972019-11-05redhat
redhatpython3-0:3.6.8-15.1.el82019-11-05redhat
redhatpython-0:2.7.5-86.el72019-08-06redhat
redhatpython27-python-0:2.7.16-6.el72019-07-08redhat

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.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(4)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 11× in last 7d / 39× 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.

  1. 2026-07-22 22:30 UTCEG score recompute
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  28. 2026-06-15 04:43 UTCOSV refresh
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  61. 2026-05-27 21:30 UTCVendor advisory
  62. 2026-05-27 21:30 UTCGHSA enrichment
  63. 2026-05-27 13:39 UTCEPSS rescore
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Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2019-9948?
CVE-2019-9948 is a critical vulnerability published on March 23, 2019. urllib in Python 2.x through 2.7.16 supports the localfile: scheme, which makes it easier for remote attackers to bypass protection mechanisms that blacklist file: URIs, as demonstrated by triggering a urllib.urlopen('localfile:///etc/passwd') call.
When was CVE-2019-9948 disclosed?
CVE-2019-9948 was first published in the National Vulnerability Database on March 23, 2019, 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-2019-9948 actively exploited?
CVE-2019-9948 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 95.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2019-9948?
CVE-2019-9948 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2019-9948?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-9948, 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.

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