An issue was discovered in Pillow before 8.2.0.
Priority LOW 38CWE-400Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 1 fixed, 2 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-400.
Summary
An issue was discovered in Pillow before 8.2.0. For EPS data, the readline implementation used in EPSImageFile has to deal with any combination of \r and \n as line endings. It used an accidentally quadratic method of accumulating lines while looking for a line ending. A malicious EPS file could use this to perform a DoS of Pillow in the open phase, before an image was accepted for opening.
Why it matters now
EPSS 0.02469 84th percentileScored 2026-11-07
Fix Partial pillow (PyPI): 8.2.0Red Hat: 1 advisoryRed Hat: 1 fixed, 2 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 8.2.0 | 8.2.0 | Patch available | GHSA-q5hq-fp76-qmrc |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- pillow (PyPI) Vendor— Affected before 8.2.0 Fixed in 8.2.0 Patch available GHSA-q5hq-fp76-qmrc
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:* | before 8.2.0 | Vulnerable | python-pillow |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
- cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:* Versions before 8.2.0 Vulnerable ·python-pillow
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
Remediation
- Fix · GHSA-q5hq-fp76-qmrc pillow (PyPI) Fixed in 8.2.0 Advisory →
Red Hat 1 advisory
- 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
Vendor assessments
Red Hat
Red Hat rating: Moderate. 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 |
| Red Hat Quay 3 | Affected | No fix yet |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2021:4149 |
Timeline
- 2026-10-02 Threatist record created from CVE-2021-28677
- 2026-10-03 Alias added: GHSA-q5hq-fp76-qmrc
References
Advisory 6
- https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28677-fix-eps-dos-on-open
- FEDORA-2021-77756994ba
- GLSA-202107-33
- [debian-lts-announce] 20210722 [SECURITY] [DLA 2716-1] pillow security update
- https://nvd.nist.gov/vuln/detail/CVE-2021-28677
- https://github.com/advisories/GHSA-q5hq-fp76-qmrc
Other 4
- https://github.com/python-pillow/Pillow/commit/5a5e6db0abf4e7a638fb1b3408c4e495a096cb92
- https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2021-93.yaml
- https://github.com/python-pillow/Pillow
- https://lists.fedoraproject.org/archives/list/[email protected]/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL
Sources
- CVE-2021-28677 · CVE Program
- CVE-2021-28677 · NVD
- FIRST EPSS
- GHSA-q5hq-fp76-qmrc · GitHub Advisory Database · CC BY 4.0
- CVE-2021-28677 · 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