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Vulnerabilities

Security fix · CVE-2026-112892

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-2026-112892. EPSS is 0.50%. 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
High8.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.50%
Remediation
Version ranges on file
Affected products
PyPI pillow · pip pillow · pypi pillow

### Summary The MSP RLE decoder expands run-length data into an in-memory buffer with no cap tied to the declared image size. A small file that passes the pixel-count check can force hundreds of megabytes or more of allocation when the application loads pixels. ### Details The MSP decoder writes each run into an unbounded and can expand roughly 85x per run: - ### Impact Memory-exhaustion denial of service from a tiny crafted image in any application that loads pixels. The expansion is decoupled from the declared pixel count, so does not bound it.

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 pillow4.1.0 → 13.0.0
  • pip pillow>= 4.1.0, < 13.0.0
  • pypi pillowversion unspecified

How to fix CVE-2026-112892

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-2026-112892. EPSS is 0.50%. Act only if a listed version of Pillow is a Python is installed.

Which versions are affected?

Compare what you have installed with 4.1.0 → 13.0.0, >= 4.1.0, < 13.0.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-409. EPSS 0.50%. 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 4.1.0 until 13.0.0, Pillow's MSP RLE decoder can expand a small file into an unbounded in-memory buffer. The decoder writes run-length output to BytesIO without limiting expansion to the declared image size. An attacker can supply a crafted MSP image to an application that loads its pixels. This can exhaust memory and deny service even when the declared pix

  2. Oct 20, 2026 · NIST NVD

    Updated

    Pillow is a Python imaging library. From 4.1.0 until 13.0.0, Pillow's MSP RLE decoder can expand a small file into an unbounded in-memory buffer. The decoder writes run-length output to BytesIO without limiting expansion to the declared image size. An attacker can supply a crafted MSP image to an application that loads its pixels. This can exhaust memory and deny service even when the declared pix

  3. Oct 21, 2026 · GitHub Advisory Database

    Updated

    ### Summary The MSP RLE decoder expands run-length data into an in-memory buffer with no cap tied to the declared image size. A small file that passes the pixel-count check can force hundreds of megabytes or more of allocation when the application loads pixels. ### Details The MSP decoder writes each run into an unbounded and can expand roughly 85x per run: - ### Impact Memory-exhaustion denial of

  4. Oct 26, 2026 · PyPA Advisory Database

    Fix available

    pillow fixed in 13.0.0

  5. Oct 26, 2026 · PyPA Advisory Database

    Fix available

    pillow fixed in 13.0.0

  6. Oct 26, 2026 · PyPA Advisory Database

    Updated

    ### Summary The MSP RLE decoder expands run-length data into an in-memory buffer with no cap tied to the declared image size. A small file that passes the pixel-count check can force hundreds of megabytes or more of allocation when the application loads pixels. ### Details The MSP decoder writes each run into an unbounded and can expand roughly 85x per run: - ### Impact Memory-exhaustion denial of

Sources

  • CVE.orgVulnerability recordCVE-2026-112892

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-112892

    30-day exploitation probability 0.50%

    first.org
  • GitHub Advisory DatabasePackage advisoryGHSA-gg2r-wvfm-q9rx

    Pillow: MSP RLE decoder expands a tiny file into unbounded memory

    github.com
  • GitLab Advisory DatabasePackage advisoryCVE-2026-112892

    The MSP RLE decoder expands run-length data into an in-memory buffer with no cap tied to the declared image size. A small file that passes the pixel-count check can force hundreds of megabytes or more of allocation when the application loads pixels.

    advisories.gitlab.com
  • NIST NVDVulnerability recordCVE-2026-112892

    Pillow is a Python imaging library. From 4.1.0 until 13.0.0, Pillow's MSP RLE decoder can expand a small file into an unbounded in-memory buffer. The decoder writes run-length output to BytesIO without limiting expansion to the declared image size. An attacker can supply a crafte

    nvd.nist.gov
  • PyPA Advisory DatabasePackage advisoryGHSA-gg2r-wvfm-q9rx

    Pillow: MSP RLE decoder expands a tiny file into unbounded memory

    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
  • GitLab Advisory DatabaseOct 23, 2026
  • GitHub Advisory DatabaseOct 22, 2026
  • CVE.orgOct 21, 2026
  • NIST NVDOct 21, 2026