Vulnerability · CVE-2016-4009
Integer overflow in the ImagingResampleHorizontal function in libImaging/Resample.c in Pillow before 3.1.1 allows remote attackers to have unspecified impact via negat…
Published Apr 13, 2016 · catalog updated Jun 17, 2026 · the affected product
Last checked Nov 8, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2016-4009. EPSS is 7.87%. Act only if a listed version of the affected product is installed.
Gaps on this record
- No plain product name is stored. The page cannot tell you which product to check.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2026-96641 · Medium
- CVE-2026-96640 · High
- CVE-2026-96778 · High
- CVE-2026-59198 · High
- CVE-2026-55798 · Medium
- Severity
- Critical9.8
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 7.87%
- Remediation
- Version ranges on file
- Affected products
- cpe python/pillow
Integer overflow in the ImagingResampleHorizontal function in libImaging/Resample.c in Pillow before 3.1.1 allows remote attackers to have unspecified impact via negative values of the new size, which triggers a heap-based buffer overflow.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe python/pillow<= 3.1.0
How to fix CVE-2016-4009
Upgrade
CVE-2016-4009 lists a fix boundary at 3.1.0. Compare the installed build with that boundary before you change production.
Version check
Affected <= 3.1.0
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2016-4009. EPSS is 7.87%. Act only if a listed version of the affected product is installed.
Which versions are affected?
Compare what you have installed with <= 3.1.0. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-119: Buffer Overflow. EPSS 7.87%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Technology hubs
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Apr 13, 2016 · Monitored products — high
Detected
Integer overflow in the ImagingResampleHorizontal function in libImaging/Resample.c in Pillow before 3.1.1 allows remote attackers to have unspecified impact via negative values of the new size, which triggers a heap-based buffer overflow.
Jun 17, 2026 · Monitored products — high
Updated
Integer overflow in the ImagingResampleHorizontal function in libImaging/Resample.c in Pillow before 3.1.1 allows remote attackers to have unspecified impact via negative values of the new size, which triggers a heap-based buffer overflow.
Sources
- CVE.orgVulnerability recordCVE-2016-4009
Official CVE identifier
cve.org - Monitored products — highVendor advisoryCVE-2016-4009
Integer overflow in the ImagingResampleHorizontal function in libImaging/Resample.c in Pillow before 3.1.1 allows remote attackers to have unspecified impact via negative values of the new size, which triggers a heap-based buffer overflow.
nvd.nist.gov
References
Freshness
Last verified in this catalog Nov 8, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- CVE.orgNov 8, 2026
- Monitored products — highNov 8, 2026