CVE-2026-8454: CWE-787 Out-of-bounds Write in TONYC Imager::File::GIF
CVE-2026-8454 is a heap out-of-bounds write vulnerability in the TONYC Imager::File::GIF Perl module versions through 1. 002. The flaw occurs in the handling of multi-frame GIF files where a buffer sized for the global screen width is reused improperly across frames. A missing bounds check in a specific code branch allows writing beyond the allocated buffer when processing crafted GIF images.
AI Analysis
Technical Summary
The vulnerability exists in the i_readgif_multi_low function of Imager::File::GIF, which allocates a single per-row buffer based on the GIF's global screen width (SWidth) and reuses it for each image frame. While one code path validates that Image.Width + Image.Left does not exceed SWidth before writing, another path (at imgif.c:790-805) calls DGifGetLine without this validation, leading to a heap out-of-bounds write when processing maliciously crafted multi-frame GIF files.
Potential Impact
An attacker could exploit this vulnerability by supplying a specially crafted multi-frame GIF file to trigger a heap out-of-bounds write. This could potentially lead to memory corruption, which might cause application crashes or enable arbitrary code execution depending on the context in which the module is used. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch is currently available, users should exercise caution when processing untrusted multi-frame GIF files with Imager::File::GIF versions through 1.002. Monitoring for vendor updates and applying patches promptly once available is recommended.
CVE-2026-8454: CWE-787 Out-of-bounds Write in TONYC Imager::File::GIF
Description
CVE-2026-8454 is a heap out-of-bounds write vulnerability in the TONYC Imager::File::GIF Perl module versions through 1. 002. The flaw occurs in the handling of multi-frame GIF files where a buffer sized for the global screen width is reused improperly across frames. A missing bounds check in a specific code branch allows writing beyond the allocated buffer when processing crafted GIF images.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability exists in the i_readgif_multi_low function of Imager::File::GIF, which allocates a single per-row buffer based on the GIF's global screen width (SWidth) and reuses it for each image frame. While one code path validates that Image.Width + Image.Left does not exceed SWidth before writing, another path (at imgif.c:790-805) calls DGifGetLine without this validation, leading to a heap out-of-bounds write when processing maliciously crafted multi-frame GIF files.
Potential Impact
An attacker could exploit this vulnerability by supplying a specially crafted multi-frame GIF file to trigger a heap out-of-bounds write. This could potentially lead to memory corruption, which might cause application crashes or enable arbitrary code execution depending on the context in which the module is used. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch is currently available, users should exercise caution when processing untrusted multi-frame GIF files with Imager::File::GIF versions through 1.002. Monitoring for vendor updates and applying patches promptly once available is recommended.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- CPANSec
- Date Reserved
- 2026-05-13T02:02:58.825Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a070551ec166c07b034bb28
Added to database: 5/15/2026, 11:36:49 AM
Last enriched: 5/15/2026, 11:51:49 AM
Last updated: 5/15/2026, 12:47:44 PM
Views: 6
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.