An issue was discovered in Pillow before 8.1.1.
Priority MEDIUM 47CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-787 and the CVSS impact.
Summary
An issue was discovered in Pillow before 8.1.1. TiffDecode has a heap-based buffer overflow when decoding crafted YCbCr files because of certain interpretation conflicts with LibTIFF in RGBA mode. NOTE: this issue exists because of an incomplete fix for CVE-2020-35654.
Why it matters now
EPSS 0.02345 83rd percentileScored 2026-11-07
Fix Fixed pillow (PyPI): 8.1.1Red Hat: 1 advisory
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | pillow (PyPI) | before 8.1.1 | 8.1.1 | Patch available | GHSA-57h3-9rgr-c24m |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- pillow (PyPI) Vendor— Affected before 8.1.1 Fixed in 8.1.1 Patch available GHSA-57h3-9rgr-c24m
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:* | before 8.1.1 | Vulnerable | python-pillow |
- cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:* Versions before 8.1.1 Vulnerable ·python-pillow
Remediation
- Fix · GHSA-57h3-9rgr-c24m pillow (PyPI) Fixed in 8.1.1 Advisory →
Red Hat 1 advisory
- RHSA-2021:3917 Released 2021-10-19 · Red Hat rating ImportantRed Hat Quay v3.6.0 security, bug fix and enhancement update
- Quay v3 quay/quay-rhel8
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Quay v3 | Fixed | RHSA-2021:3917 |
Not affected: 4 products
- Quay v3
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2021-25289
- 2026-10-03 Alias added: GHSA-57h3-9rgr-c24m
References
Advisory 4
Other 4
More python-pillow Pillow vulnerabilities
- TI-2026-76627 Out-of-bounds read in Pillow TIFF encoder ColorMap handling CVSS 4.0HIGH 8.8
- TI-2026-76625 Quadratic-time denial of service in Pillow PDF save_all CVSS 4.0HIGH 8.7
- TI-2026-76605 NULL pointer dereference in Pillow's Image.merge function CVSS 4.0HIGH 8.7
- TI-2026-76604 Out-of-bounds read in Pillow TIFF decoding leaks heap memory CVSS 4.0HIGH 8.8
- TI-2026-76602 Double free in Pillow ImagingScaleAffine on allocation failure CVSS 4.0HIGH 8.7
- TI-2026-76600 GIF seek in Pillow keeps rejected size, allowing denial of service CVSS 4.0HIGH 8.7
Sources
- CVE-2021-25289 · CVE Program
- CVE-2021-25289 · NVD
- FIRST EPSS
- GHSA-57h3-9rgr-c24m · GitHub Advisory Database · CC BY 4.0
- CVE-2021-25289 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences