6.5

CVE-2019-9740: python

Modified
AliasesUBUNTU-CVE-2019-9740DEBIAN-CVE-2019-9740openSUSE-SU-2024:11204-1
Published 13-03-2019Last modified 14-10-2026

Vulnerability summary

CVE-2019-9740 is a medium (CVSS 6.5) vulnerability in python. EPSS estimates a 5.41% chance of exploitation in the next 30 days, higher than 92.7% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Routine

Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
5.41%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 30 · Related 17
DLA-1834-1DLA-1835-1DLA-2280-1DLA-2337-1MGASA-2019-0318OPENSUSE-SU-2019:2131-1

Timeline

  1. 13-03-2019
    PublishedVulnerability first disclosed.
  2. 14-10-2026
    Last modifiedVulnerability information updated.

Description

An issue was discovered in urllib2 in Python 2.x through 2.7.16 and urllib in Python 3.x through 3.7.3. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \r\n (specifically in the query string after a ? character) followed by an HTTP header or a Redis command. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.9, v3.6.9rc1; v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9.

CVSS metrics

6 scores · 4 sources · 3 versions

EPSS trend

Probability

5.41%

Chance of exploitation in the next 30 days

Percentile

93%

Versus all other CVEs

30-day change

Increase +0.04 pp

From 5.37% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (bugs.python.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu4 products
  • python2.7< 2.7.6-8ubuntu0.6+esm2 | < 2.7.12-1ubuntu0~16.04.8 | < 2.7.15-4ubuntu4~18.04.1
  • python3.4< 3.4.3-1ubuntu1~14.04.7+esm2
  • python3.5< 3.5.2-2ubuntu0~16.04.4~14.04.1+esm1 | < 3.5.2-2ubuntu0~16.04.8
  • python3.6< 3.6.8-1~18.04.2
Debian1 product
  • python2.7< 2.7.16-3
Opensuse1 product
  • python-CherryPy&distro=openSUSE Tumbleweed< 18.9.0-3.3 | < 18.10.0-4.1 | < 18.6.1-1.2
Python1 product
  • python≥ 2.0, < 2.7.17 | ≥ 3.5.0, < 3.5.8 | ≥ 3.6.0, < 3.6.9 | ≥ 3.7.0, < 3.7.4

4 vendors · 7 products

References

38 links
Show all 38 references