In Pillow before 8.1.0, PcxDecode has a buffer over-read when decoding a crafted PCX file…
Priority LOW 35CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · None · High
- Fix status
- Partial Red Hat: 2 fixed, 1 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat.
Summary
In Pillow before 8.1.0, PcxDecode has a buffer over-read when decoding a crafted PCX file because the user-supplied stride value is trusted for buffer calculations.
Why it matters now
EPSS 0.0164 76th percentileScored 2026-11-07
Fix Partial pillow (PyPI): 8.1.0Red Hat: 2 advisoriesRed Hat: 2 fixed, 1 without a fix
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 8.1.0 | 8.1.0 | Patch available | GHSA-f5g8-5qq7-938w |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- pillow (PyPI) Vendor— Affected before 8.1.0 Fixed in 8.1.0 Patch available GHSA-f5g8-5qq7-938w
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:* | before 8.1.0 | Vulnerable | python-pillow |
| cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | 32 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
- cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:* Versions before 8.1.0 Vulnerable ·python-pillow
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
Remediation
- Fix · GHSA-f5g8-5qq7-938w pillow (PyPI) Fixed in 8.1.0 Advisory →
Red Hat 2 advisories
- RHSA-2021:4149 Released 2021-11-09 · Red Hat rating Moderatepython-pillow security update
- Red Hat Enterprise Linux AppStream (v. 8) python-pillow-5.1.1-16.el8, python3-pillow-5.1.1-16.el8
- 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: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Quay v3 | Fixed | RHSA-2021:3917 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2021:4149 |
Not affected: 3 products
- Quay v3
- Red Hat Enterprise Linux 9
- Red Hat Quay 3
Timeline
- 2026-10-02 Threatist record created from CVE-2020-35653
- 2026-10-03 Alias added: GHSA-f5g8-5qq7-938w
References
Advisory 5
Other 6
- [debian-lts-announce] 20210722 [SECURITY] [DLA 2716-1] pillow security update
- https://github.com/python-pillow/Pillow/commit/2f409261eb1228e166868f8f0b5da5cda52e55bf
- https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2021-69.yaml
- https://github.com/python-pillow/Pillow
- https://lists.fedoraproject.org/archives/list/[email protected]/message/6BYVI5G44MRIPERKYDQEL3S3YQCZTVHE
- https://lists.fedoraproject.org/archives/list/[email protected]/message/BF553AMNNNBW7SH4IM4MNE4M6GNZQ7YD
Sources
- CVE-2020-35653 · CVE Program
- CVE-2020-35653 · NVD
- FIRST EPSS
- GHSA-f5g8-5qq7-938w · GitHub Advisory Database · CC BY 4.0
- CVE-2020-35653 · 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