CVE-2018-1060: python before versions 2.7.15, 3.4.9, 3.5.6rc1, 3.6.5rc1 and 3.7.0 is vulnerable to catastrophic backtracking in pop3lib's apop() method.

Patch / fix

fixed in 1 distros 6

python python 2.7.15, 3.4.9, 3.5.6, 3.6.5

debian ubuntu red hat suse opensuse alpine

python2.7 Debian 11 2.7.14-7

debian advisories DEBIAN-CVE-2018-1060

python2.7 Ubuntu 14.04 LTS 2.7.6-8ubuntu0.5
python2.7 Ubuntu 16.04 LTS 2.7.12-1ubuntu0~16.04.4
python3.4 Ubuntu 14.04 LTS 3.4.3-1ubuntu1~14.04.7
python3.5 Ubuntu 16.04 LTS 3.5.2-2ubuntu0~16.04.5
python3.5 Ubuntu Pro 14.04 LTS 3.5.2-2ubuntu0~16.04.4~14.04.1+esm1

ubuntu advisories UBUNTU-CVE-2018-1060

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

rh-python36-python RHEL 3 SOFTWARE_COLLECTIONS 3.6.9-2.el6
rh-python36-python RHEL 3 SOFTWARE_COLLECTIONS 3.6.9-2.el7
rh-python36-python-libs RHEL 3 SOFTWARE_COLLECTIONS 3.6.9-2.el6
rh-python36-python-libs RHEL 3 SOFTWARE_COLLECTIONS 3.6.9-2.el7
rh-python36-python-test RHEL 3 SOFTWARE_COLLECTIONS 3.6.9-2.el6
rh-python36-python-test RHEL 3 SOFTWARE_COLLECTIONS 3.6.9-2.el7
rh-python36-python-tools RHEL 3 SOFTWARE_COLLECTIONS 3.6.9-2.el6
rh-python36-python-tools RHEL 3 SOFTWARE_COLLECTIONS 3.6.9-2.el7

red hat advisories RHSA-2020:1346 RHSA-2019:3725 RHSA-2020:1268 RHSA-2019:1260 RHSA-2018:3041

python36 SLES for SAP 12 SP5, SLES 12 SP5 3.6.10-4.3.5
python36-base SLES for SAP 12 SP5, SLES 12 SP5 3.6.10-4.3.5
python SLE Module for Python 2 15 SP1, SLE Module for Desktop Applications 15 SP1, SLE Module for Desktop Applications 15 +2 more 2.7.17-7.32.2
python-base SLE Module for Python 2 15 SP1, SLE Module for Basesystem 15 SP1, SLE Module for Basesystem 15 2.7.17-7.32.1
python3 SLE Module for Basesystem 15 SP1, SLE Module for Basesystem 15 3.6.10-3.42.2
python3-base SLE Module for Development Tools 15 SP1, SLE Module for Development Tools 15, SLE Module for Basesystem 15 SP1 +1 more 3.6.10-3.42.2
python-base SLES 12 SP4, SLES 12 SP3, SLED 12 SP4 +7 more 2.7.13-28.16.1
python SLES 12 SP4, SLES 12 SP3, SLED 12 SP4 +4 more 2.7.13-28.16.1

suse advisories SUSE-SU-2020:0302-1 SUSE-SU-2020:0234-1 SUSE-SU-2020:0114-1 SUSE-SU-2018:3554-2 SUSE-SU-2018:3554-1 SUSE-SU-2018:2696-1

python openSUSE Tumbleweed 2.7.18-8.1
python36 openSUSE Tumbleweed 3.6.15-1.1
python3 openSUSE Leap 15.1 3.6.10-lp151.6.7.1
python3-base openSUSE Leap 15.1 3.6.10-lp151.6.7.1

opensuse advisories openSUSE-SU-2024:11202-1 openSUSE-SU-2024:11284-1 openSUSE-SU-2020:0086-1

python2 Alpine 3.15, Alpine 3.14, Alpine 3.13 +7 more 2.7.15-r0
python3 Alpine 3.5 3.5.6-r0
python3 Alpine 3.7, Alpine 3.6 3.6.5-r0
python3 Alpine 3.8 3.6.6-r0
python2-tkinter Alpine 3.11, Alpine 3.10, Alpine 3.9 2.7.15-r0

alpine advisories ALPINE-CVE-2018-1060

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-1060 updated 2026-11-06 cvss 4.3

python: DOS via regular expression catastrophic backtracking in apop() method in pop3lib

Red Hat Enterprise Linux 5 python Red Hat Enterprise Linux 6 python, tkinter, python-libs, python-test, python-tools
affected: no fix planned “Will not fix”
Red Hat Software Collections rh-python34-python, rh-python35-python, rh-python34-python-libs, rh-python34-python-test, rh-python35-python-libs, rh-python35-python-test, +4 more
affected: no fix available, no fix planned “Will not fix”
Red Hat Enterprise Linux Client (v. 7) python 2.7.5-76.el7, python-libs 2.7.5-76.el7 Red Hat Enterprise Linux Client Optional (v. 7) tkinter 2.7.5-76.el7, python-test 2.7.5-76.el7, python-tools 2.7.5-76.el7 Red Hat Enterprise Linux ComputeNode (v. 7) python 2.7.5-76.el7, python-libs 2.7.5-76.el7
fixed: vendor fix RHSA-2018:3041
Red Hat Enterprise Linux ComputeNode EUS (v. 7.5) python 2.7.5-74.el7_5, python-libs 2.7.5-74.el7_5
fixed: vendor fix RHSA-2020:1268
Red Hat Enterprise Linux ComputeNode Optional (v. 7) tkinter 2.7.5-76.el7, python-test 2.7.5-76.el7, python-tools 2.7.5-76.el7
fixed: vendor fix RHSA-2018:3041
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5) tkinter 2.7.5-74.el7_5, python-test 2.7.5-74.el7_5, python-tools 2.7.5-74.el7_5
fixed: vendor fix RHSA-2020:1268
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) python 2.7.5-76.el7, python-libs 2.7.5-76.el7 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) tkinter 2.7.5-76.el7, python-test 2.7.5-76.el7, python-tools 2.7.5-76.el7 Red Hat Enterprise Linux Server (v. 7) python 2.7.5-76.el7, python-libs 2.7.5-76.el7
fixed: vendor fix RHSA-2018:3041
Red Hat Enterprise Linux Server AUS (v. 7.4) python 2.7.5-63.el7_4, python-libs 2.7.5-63.el7_4 Red Hat Enterprise Linux Server E4S (v. 7.4) python 2.7.5-63.el7_4, python-libs 2.7.5-63.el7_4
fixed: vendor fix RHSA-2020:1346

show 9 more

Red Hat Enterprise Linux Server EUS (v. 7.5) python 2.7.5-74.el7_5, python-libs 2.7.5-74.el7_5
fixed: vendor fix RHSA-2020:1268
Red Hat Enterprise Linux Server Optional (v. 7) tkinter 2.7.5-76.el7, python-test 2.7.5-76.el7, python-tools 2.7.5-76.el7
fixed: vendor fix RHSA-2018:3041
Red Hat Enterprise Linux Server Optional AUS (v. 7.4) tkinter 2.7.5-63.el7_4, python-test 2.7.5-63.el7_4, python-tools 2.7.5-63.el7_4 Red Hat Enterprise Linux Server Optional E4S (v. 7.4) tkinter 2.7.5-63.el7_4, python-test 2.7.5-63.el7_4, python-tools 2.7.5-63.el7_4
fixed: vendor fix RHSA-2020:1346
Red Hat Enterprise Linux Server Optional EUS (v. 7.5) tkinter 2.7.5-74.el7_5, python-test 2.7.5-74.el7_5, python-tools 2.7.5-74.el7_5
fixed: vendor fix RHSA-2020:1268
Red Hat Enterprise Linux Server Optional TUS (v. 7.4) tkinter 2.7.5-63.el7_4, python-test 2.7.5-63.el7_4, python-tools 2.7.5-63.el7_4 Red Hat Enterprise Linux Server TUS (v. 7.4) python 2.7.5-63.el7_4, python-libs 2.7.5-63.el7_4
fixed: vendor fix RHSA-2020:1346
Red Hat Enterprise Linux Workstation (v. 7) python 2.7.5-76.el7, python-libs 2.7.5-76.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) tkinter 2.7.5-76.el7, python-test 2.7.5-76.el7, python-tools 2.7.5-76.el7
fixed: vendor fix RHSA-2018:3041
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) python27-python 2.7.16-4.el6, python27-tkinter 2.7.16-4.el6, rh-python36-python 3.6.9-2.el6, python27-python-jinja2 2.6-12.el6, python27-python-libs 2.7.16-4.el6, python27-python-test 2.7.16-4.el6, +5 more Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) python27-python 2.7.16-4.el7, python27-tkinter 2.7.16-4.el7, rh-python36-python 3.6.9-2.el7, python27-python-jinja2 2.6-15.el7, python27-python-libs 2.7.16-4.el7, python27-python-test 2.7.16-4.el7, +5 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) python27-python 2.7.16-4.el7, python27-tkinter 2.7.16-4.el7, python27-python-jinja2 2.6-15.el7, python27-python-libs 2.7.16-4.el7, python27-python-test 2.7.16-4.el7, python27-python-tools 2.7.16-4.el7 Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) python27-python 2.7.16-4.el7, python27-tkinter 2.7.16-4.el7, rh-python36-python 3.6.9-2.el7, python27-python-jinja2 2.6-15.el7, python27-python-libs 2.7.16-4.el7, python27-python-test 2.7.16-4.el7, +5 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) python27-python 2.7.16-4.el7, python27-tkinter 2.7.16-4.el7, rh-python36-python 3.6.9-2.el7, python27-python-jinja2 2.6-15.el7, python27-python-libs 2.7.16-4.el7, python27-python-test 2.7.16-4.el7, +5 more
fixed: vendor fix RHSA-2019:1260
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) rh-python36-python 3.6.9-2.el7, rh-python36-python-libs 3.6.9-2.el7, rh-python36-python-test 3.6.9-2.el7, rh-python36-python-tools 3.6.9-2.el7, rh-python36-python-tkinter 3.6.9-2.el7
fixed: vendor fix RHSA-2019:3725
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) python27-python 2.7.16-4.el6, python27-tkinter 2.7.16-4.el6, rh-python36-python 3.6.9-2.el6, python27-python-jinja2 2.6-12.el6, python27-python-libs 2.7.16-4.el6, python27-python-test 2.7.16-4.el6, +5 more Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) python27-python 2.7.16-4.el7, python27-tkinter 2.7.16-4.el7, rh-python36-python 3.6.9-2.el7, python27-python-jinja2 2.6-15.el7, python27-python-libs 2.7.16-4.el7, python27-python-test 2.7.16-4.el7, +5 more
fixed: vendor fix RHSA-2019:1260

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 31 d ago (2026-10-08)

Exploit prediction

5.04% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

bugs.python.org https://bugs.python.org/issue32981 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.0	4.3	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

[UNKNOWN] python

Classification

Weakness

CWE-20 Improper Input Validation

References

bugs.python.org /issue32981
exploit, issue-tracking, vendor-advisory
debian.org /security/2018/dsa-4306
vendor-advisory, third-party-advisory
usn.ubuntu.com /3817-2/
vendor-advisory, third-party-advisory
access.redhat.com /errata/RHSA-2018:3505
vendor-advisory, third-party-advisory
access.redhat.com /errata/RHSA-2018:3041
vendor-advisory, third-party-advisory
debian.org /security/2018/dsa-4307
vendor-advisory, third-party-advisory
usn.ubuntu.com /3817-1/
vendor-advisory, third-party-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/JSKPGPZQNTAULHW4UH63KGOOUIDE4RRB/
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/AEZ5IQT7OF7Q2NCGIVABOWYGKO7YU3NJ/
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/46PVWY5LFP4BRPG3BVQ5QEEFYBVEXHCK/
vendor-advisory
access.redhat.com /errata/RHBA-2019:0327
vendor-advisory, third-party-advisory
access.redhat.com /errata/RHSA-2019:1260
vendor-advisory, third-party-advisory
access.redhat.com /errata/RHSA-2019:3725
vendor-advisory, third-party-advisory
lists.opensuse.org /opensuse-security-announce/2020-01/msg00040.html
vendor-advisory, mailing-list, third-party-advisory
docs.python.org /3.6/whatsnew/changelog.html#python-3-6-5-release-candidate-1
product, vendor-advisory
docs.python.org /3.5/whatsnew/changelog.html#python-3-5-6-release-candidate-1
product, vendor-advisory
securitytracker.com /id/1042001
vdb-entry, third-party-advisory
lists.debian.org /debian-lts-announce/2018/09/msg00031.html
mailing-list, third-party-advisory
bugzilla.redhat.com /show_bug.cgi?id=CVE-2018-1060
issue-tracking, third-party-advisory
lists.debian.org /debian-lts-announce/2018/09/msg00030.html
mailing-list, third-party-advisory
support.hpe.com /hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbst03951en_us
third-party-advisory
oracle.com /security-alerts/cpujan2020.html
third-party-advisory

Sources

CVE List CVE-2018-1060
NVD CVE-2018-1060

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary