CVE-2026-8454

Heap corruption via unchecked skipped-frame dimensions

Published May 15, 2026 · Updated May 15, 2026

Out-of-bounds write in Tony Cook Imager::File::GIF 1.002 and earlier allows attackers to corrupt heap memory via a crafted multi-frame GIF. The i_readgif_multi_low routine reuses a row buffer sized to the global screen width, but the skipped-image branch writes a frame-width row without validating its dimensions. A consuming Perl application must process the file and select a later frame, enabling a crash or memory corruption within that process.

CVSS severity5.3
Medium
EPSS probability0.19%
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 write in Tony Cook Imager::File::GIF 1.002 and earlier allows attackers to corrupt heap memory via a crafted multi-frame GIF. The i_readgif_multi_low routine reuses a row buffer sized to the global screen width, but the skipped-image branch writes a frame-width row without validating its dimensions. A consuming Perl application must process the file and select a later frame, enabling a crash or memory corruption within that process.

The record

CVE
CVE-2026-8454
Published
May 15, 2026
Updated
May 15, 2026
Vendor
Tony Cook
Product
Imager::File::GIF
Classifications
CWE-787, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 15, 2026CVE publishedPublication date reported by the CVE source.
  2. May 15, 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?

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  1. Affected versionversion=0 <=1.002

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Tony Cook · Imager::File::GIFversion=0 <=1.002

Published CVSS scores

5.3CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

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

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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