CVE-2020-35654Public exploitNetwork attack vector

Memory corruption via mismatched YCbCr strip dimensions

Published Jan 12, 2021 · Updated Aug 4, 2024

Heap-based buffer overflow in Pillow 6.0.0 through 8.0.1 allows context-dependent attackers to corrupt memory via a crafted YCbCr TIFF file. TiffDecode trusts dimensions interpreted differently by Pillow and LibTIFF's RGBA mode, allowing a four-byte write beyond its allocated strip buffer. Exploitation requires an application to decode the file with an affected LibTIFF configuration; the overwrite can crash the process or corrupt its memory.

CVSS severity8.8
High
EPSS probability1.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Pillow 6.0.0 through 8.0.1 allows context-dependent attackers to corrupt memory via a crafted YCbCr TIFF file. TiffDecode trusts dimensions interpreted differently by Pillow and LibTIFF's RGBA mode, allowing a four-byte write beyond its allocated strip buffer. Exploitation requires an application to decode the file with an affected LibTIFF configuration; the overwrite can crash the process or corrupt its memory.

The record

CVE
CVE-2020-35654
Published
Jan 12, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1204.002, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 12, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002Malicious File
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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