CVE-2019-9948
CVSS v3
9.1
CRITICAL
EPSS Score
11.8 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
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.
Technical details
- Published
- 2019-03-23
Frequently asked questions
What is CVE-2019-9948?
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.
Is CVE-2019-9948 actively exploited?
Active exploitation of CVE-2019-9948 has not been confirmed. Its EPSS score was 11.8% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2019-9948?
CVE-2019-9948 has a CVSS v3 base score of 9.1 (CRITICAL severity).
Is CVE-2019-9948 affecting your environment?
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