CVE-2026-59198Public exploitNetwork attack vector

Heap disclosure via byte-per-pixel row overrun

Published Jul 14, 2026 · Updated Jul 14, 2026

Out-of-bounds read in Pillow 5.2.0 through 12.2.0 allows remote attackers to expose process heap data through TGA RLE output. ImagingTgaRleEncode treats each mode 1 pixel as a full byte even though _setimage allocates a bit-packed row, so packet copies overrun the row buffer. Reachability requires an application to save a mode 1 image with TGA RLE compression; the generated file contains up to about 57 KB of adjacent heap data.

CVSS severity6.5
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Pillow 5.2.0 through 12.2.0 allows remote attackers to expose process heap data through TGA RLE output. ImagingTgaRleEncode treats each mode 1 pixel as a full byte even though _setimage allocates a bit-packed row, so packet copies overrun the row buffer. Reachability requires an application to save a mode 1 image with TGA RLE compression; the generated file contains up to about 57 KB of adjacent heap data.

The record

CVE
CVE-2026-59198
Published
Jul 14, 2026
Updated
Jul 14, 2026
Vendor
Pillow
Product
Pillow
Classifications
CWE-125, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 5.2.0, < 12.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pillow · Pillowversion=>= 5.2.0, < 12.3.0

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
6.5GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1005Data from Local System

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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