CVE-2021-34552
No exploitation reported by the sources we read.
- Published2021-07-13
- WeaknessCWE-120
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Pillow through 8.2.0 and PIL (aka Python Imaging Library) through 1.1.7 allow an attacker to pass controlled parameters directly into a convert function to trigger a buffer overflow in Convert.c.
Timeline
dates in UTC- 2021-07-1317:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-34552?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-34552?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD · OSV| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 33.x | = 33 | no fix published | NVD |
| 34.x | = 34 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.x | ≥ 1.0, ≤ 1.1.7 | no fix published | NVD |
| 8.2 | ≥ 1.2, ≤ 8.2.0 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 8.2 | ≥ 1.2.0, < 8.2.1 | 8.2.1 | OSV |
| 1.x | ≥ 1.0.0, < 1.1.8 | 1.1.8 | OSV |
2 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- python3-pillowAlmaLinux:8all versions · fixed in 5.1.1-16.el8
Fix
Advisories and patches
- pillow.readthedocs.ioRelease Notes · Vendor Advisory
- pillow.readthedocs.ioRelease Notes · Vendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVSS 3.19.8read 2026-10-23
- NVDCVSS 2.07.5read 2026-10-23
- NVDweakness (CWE)CWE-120read 2026-10-23
- FIRST EPSSEPSS score3.2 %2026-10-23
- OSVaffected packages—
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 2021-07-13
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-34552?
Is CVE-2021-34552 actively exploited?
What is the CVSS score for CVE-2021-34552?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.