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TI-2019-13355 Aliases CVE-2019-18348GHSA-v3f8-6665-x7rx

An issue was discovered in urllib2 in Python 2.x through 2.7.17 and urllib in Python 3.x…

Priority LOW 33CWE-74Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
Partial Red Hat: 6 fixed, 3 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

An issue was discovered in urllib2 in Python 2.x through 2.7.17 and urllib in Python 3.x through 3.8.0. 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 host component of a URL) followed by an HTTP header. This is similar to the CVE-2019-9740 query string issue and the CVE-2019-9947 path string issue. (This is not exploitable when glibc has CVE-2016-10739 fixed.). This is fixed in: v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1; v3.6.11, v3.6.11rc1, v3.6.12; v3.7.8, v3.7.8rc1, v3.7.9; v3.8.3, v3.8.3rc1, v3.8.4, v3.8.4rc1, v3.8.5, v3.8.6, v3.8.6rc1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.03513 89th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 6 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*2.0 – 2.7.17; 3.0 to before 3.5.10; 3.6.0 to before 3.6.11; 3.7.0 to before 3.7.8; 3.8.0 to before 3.8.3Vulnerablepython-pillow
  • cpe:2.3:a:python:python:*:*:*:*:*:*:*:* Versions 2.0 – 2.7.17; 3.0 to before 3.5.10; 3.6.0 to before 3.6.11; 3.7.0 to before 3.7.8; 3.8.0 to before 3.8.3 Vulnerable ·python-pillow

Remediation

Red Hat 2 advisories

  • RHSA-2020:4273 Released 2020-10-20 · Red Hat rating Moderate
    python27 security, bug fix, and enhancement update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) python27-python-2.7.18-2.el7, python27-python-debug-2.7.18-2.el7, python27-python-devel-2.7.18-2.el7 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) python27-python-2.7.18-2.el7, python27-python-debug-2.7.18-2.el7, python27-python-devel-2.7.18-2.el7 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) python27-python-2.7.18-2.el7, python27-python-debug-2.7.18-2.el7, python27-python-devel-2.7.18-2.el7 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) python27-python-2.7.18-2.el7, python27-python-debug-2.7.18-2.el7, python27-python-devel-2.7.18-2.el7 +6
  • RHSA-2020:4285 Released 2020-10-19 · Red Hat rating Moderate
    rh-python36 security, bug fix, and enhancement update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) rh-python36-python-3.6.12-1.el6, rh-python36-python-debug-3.6.12-1.el6, rh-python36-python-devel-3.6.12-1.el6 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-python36-python-3.6.12-1.el7, rh-python36-python-debug-3.6.12-1.el7, rh-python36-python-devel-3.6.12-1.el7 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-python36-python-3.6.12-1.el7, rh-python36-python-debug-3.6.12-1.el7, rh-python36-python-devel-3.6.12-1.el7 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) rh-python36-python-3.6.12-1.el7, rh-python36-python-debug-3.6.12-1.el7, rh-python36-python-devel-3.6.12-1.el7 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) rh-python36-python-3.6.12-1.el6, rh-python36-python-debug-3.6.12-1.el6, rh-python36-python-devel-3.6.12-1.el6 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-python36-python-3.6.12-1.el7, rh-python36-python-debug-3.6.12-1.el7, rh-python36-python-devel-3.6.12-1.el7 +6

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Will not fix
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2020:4285
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2020:4273, RHSA-2020:4285
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6)Fixed RHSA-2020:4273, RHSA-2020:4285
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7)Fixed RHSA-2020:4273, RHSA-2020:4285
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2020:4285
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2020:4273, RHSA-2020:4285
Not affected: 1 product
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-18348
  2. 2026-10-03 Alias added: GHSA-v3f8-6665-x7rx
  3. 2026-10-07 CVSS score added · CISA ADP
  4. 2026-10-07 Weakness changed · CISA ADP
  5. 2026-10-07 CISA SSVC decision points changed

References

Advisory 10

Other 3

  • TI-2016-01993 The DES and Triple DES ciphers, as used in the TLS, SSH, and IPSec protocols and other… CVSS 3.1HIGH 7.5
  • TI-2022-24108 An XML External Entity (XXE) issue was discovered in Python through 3.9.1. CVSS 3.1CRITICAL 9.8
  • TI-2022-17508 The Keccak XKCP SHA-3 reference implementation before fdc6fef has an integer overflow and… CVSS 3.1CRITICAL 9.8
  • TI-2021-02254 Python 3.x through 3.9.1 has a buffer overflow in PyCArg_repr in _ctypes/callproc.c… CVSS 3.1CRITICAL 9.8
  • TI-2007-04413 Directory traversal vulnerability in the (1) extract and (2) extractall functions in the… CVSS 3.1CRITICAL 9.8
  • TI-2014-00217 OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h does not properly… CVSS 3.1HIGH 7.4
See all 139 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences