CVE-2016-5636
Integer overflow in the get_data function in zipimport.c in CPython (aka Python) before 2.7.12, 3.x before 3.4.5, and 3.5.x before 3.5.2 allows remote attackers to have unspecified impact via a negative data size value, which triggers a heap-based…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 25.5%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
Integer overflow in the get_data function in zipimport.c in CPython (aka Python) before 2.7.12, 3.x before 3.4.5, and 3.5.x before 3.5.2 allows remote attackers to have unspecified impact via a negative data size value, which triggers a heap-based buffer overflow.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 25.48% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-190
- Affected
- python/python
- Source
- cve@mitre.org
EPSS moved from 22.4% on 21 September 2026 to 25.5% on 4 November 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
- http://rhn.redhat.com/errata/RHSA-2016-2586.html
- http://www.openwall.com/lists/oss-security/2016/06/15/15Mailing List
- http://www.openwall.com/lists/oss-security/2016/06/16/1Mailing List
- http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
- http://www.securityfocus.com/bid/91247
- http://www.securitytracker.com/id/1038138
- http://www.splunk.com/view/SP-CAAAPSV
- http://www.splunk.com/view/SP-CAAAPUE
- https://bugs.python.org/issue26171Issue Tracking, Patch
- https://docs.python.org/3.4/whatsnew/changelog.html#python-3-4-5Release Notes
- https://docs.python.org/3.5/whatsnew/changelog.html#python-3-5-2Release Notes
- https://hg.python.org/cpython/raw-file/v2.7.12/Misc/NEWSRelease Notes
- https://lists.debian.org/debian-lts-announce/2019/02/msg00011.html
- https://security.gentoo.org/glsa/201701-18
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
- http://rhn.redhat.com/errata/RHSA-2016-2586.html
- http://www.openwall.com/lists/oss-security/2016/06/15/15Mailing List
- http://www.openwall.com/lists/oss-security/2016/06/16/1Mailing List
- http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
- http://www.securityfocus.com/bid/91247
- http://www.securitytracker.com/id/1038138
- http://www.splunk.com/view/SP-CAAAPSV
- http://www.splunk.com/view/SP-CAAAPUE
- https://bugs.python.org/issue26171Issue Tracking, Patch
- https://docs.python.org/3.4/whatsnew/changelog.html#python-3-4-5Release Notes
- https://docs.python.org/3.5/whatsnew/changelog.html#python-3-5-2Release Notes
- https://hg.python.org/cpython/raw-file/v2.7.12/Misc/NEWSRelease Notes
- https://lists.debian.org/debian-lts-announce/2019/02/msg00011.html
- https://security.gentoo.org/glsa/201701-18
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.