ZDF
Sign inSign up

Vulnerabilities

Security fix · CVE-2026-112891

Pillow is a Python imaging library.

Published Oct 19, 2026 · catalog updated Oct 26, 2026 · Pillow is a Python

Last checked Oct 31, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-112891. EPSS is 0.55%. Act only if a listed version of Pillow is a Python is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Pillow is a Python).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.55%
Remediation
Version ranges on file
Affected products
PyPI pillow · pip pillow

Pillow is a Python imaging library. From 9.2.0 until 13.0.0, Pillow performs quadratic copying when saving a GIF with a long comment. _get_global_header() repeatedly copies portions of comment data while assembling the global header, including comments retained from an untrusted input image. An attacker can supply an image with a large GIF comment to an application that saves it as GIF. This can consume excessive CPU and delay or deny service. This issue is fixed in version 13.0.0.

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.

  • PyPI pillow9.2.0 → 13.0.0
  • pip pillow>= 9.2.0, < 13.0.0

How to fix CVE-2026-112891

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-2026-112891. EPSS is 0.55%. Act only if a listed version of Pillow is a Python is installed.

Which versions are affected?

Compare what you have installed with 9.2.0 → 13.0.0, >= 9.2.0, < 13.0.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-407. EPSS 0.55%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Pillow security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 19, 2026 · NIST NVD

    Detected

    Pillow is a Python imaging library. From 9.2.0 until 13.0.0, Pillow performs quadratic copying when saving a GIF with a long comment. _get_global_header() repeatedly copies portions of comment data while assembling the global header, including comments retained from an untrusted input image. An attacker can supply an image with a large GIF comment to an application that saves it as GIF. This can c

  2. Oct 20, 2026 · NIST NVD

    Updated

    Pillow is a Python imaging library. From 9.2.0 until 13.0.0, Pillow performs quadratic copying when saving a GIF with a long comment. _get_global_header() repeatedly copies portions of comment data while assembling the global header, including comments retained from an untrusted input image. An attacker can supply an image with a large GIF comment to an application that saves it as GIF. This can c

  3. Oct 20, 2026 · NIST NVD

    Updated

    Pillow is a Python imaging library. From 9.2.0 until 13.0.0, Pillow performs quadratic copying when saving a GIF with a long comment. _get_global_header() repeatedly copies portions of comment data while assembling the global header, including comments retained from an untrusted input image. An attacker can supply an image with a large GIF comment to an application that saves it as GIF. This can c

  4. Oct 21, 2026 · GitHub Advisory Database

    Updated

    On Pillow 12.3.0 and upstream ( ), a GIF with a long comment makes copy portions of the comment repeatedly when saving, including comments carried over from untrusted images. I suggest provisional **Moderate** severity for crafted-image CPU denial of service, with CVSS-B 6.9 assuming a network service automatically opens unauthenticated uploads and they are resaved as GIFs; impact depends on input

  5. Oct 26, 2026 · PyPA Advisory Database

    Fix available

    pillow fixed in 13.0.0

  6. Oct 26, 2026 · PyPA Advisory Database

    Fix available

    pillow fixed in 13.0.0

  7. Oct 26, 2026 · PyPA Advisory Database

    Updated

    On Pillow 12.3.0 and upstream ( ), a GIF with a long comment makes copy portions of the comment repeatedly when saving, including comments carried over from untrusted images. I suggest provisional **Moderate** severity for crafted-image CPU denial of service, with CVSS-B 6.9 assuming a network service automatically opens unauthenticated uploads and they are resaved as GIFs; impact depends on input

Sources

  • CVE.orgVulnerability recordCVE-2026-112891

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-112891

    30-day exploitation probability 0.55%

    first.org
  • GitHub Advisory DatabasePackage advisoryGHSA-fc9g-5qg7-mf45

    Pillow: Quadratic GIF comment copying during save

    github.com
  • NIST NVDVulnerability recordCVE-2026-112891

    Pillow is a Python imaging library. From 9.2.0 until 13.0.0, Pillow performs quadratic copying when saving a GIF with a long comment. _get_global_header() repeatedly copies portions of comment data while assembling the global header, including comments retained from an untrusted

    nvd.nist.gov
  • PyPA Advisory DatabasePackage advisoryGHSA-fc9g-5qg7-mf45

    Pillow: Quadratic GIF comment copying during save

    osv.dev

References

Freshness

Last verified in this catalog Oct 31, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 31, 2026
  • PyPA Advisory DatabaseOct 26, 2026
  • GitHub Advisory DatabaseOct 22, 2026
  • CVE.orgOct 21, 2026
  • NIST NVDOct 21, 2026