CVE-2026-8454: Imager::File::GIF versions through 1.002 for Perl allow a heap out of bounds (OOB) write on crafted multi-fram

Q: How do I fix CVE-2026-8454?

imager\: upgrade to 1.003. Exact commands for each OS are on this page.

Q: Is CVE-2026-8454 being exploited?

CVE-2026-8454 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-8454 affect?

CVE-2026-8454 affects imager\. Severity is medium (CVSS 5.3). Imager::File::GIF versions through 1.002 for Perl allow a heap out of bounds (OOB) write on crafted multi-frame GIF files. Imager::File::GIF's i_readgif_multi_low allocates a single per-row buffer GifRow sized for the GIF's global screen w

Q: How urgent is CVE-2026-8454?

Priority 21/100. No elevated risk signals yet.

Routine

MEDIUM 5.3UPGRADE

CVE-2026-8454 is a medium-severity flaw (CVSS 5.3) affecting imager\. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Imager::File::GIF versions through 1.002 for Perl allow a heap out of bounds (OOB) write on crafted multi-frame GIF files. Imager::File::GIF's i_readgif_multi_low allocates a single per-row buffer GifRow sized for the GIF's global screen width 'SWidth' and reuses it across every image in the file. The page-match branch validates Image.Width + Image.Left > SWidth before each DGifGetLine write, but the parallel skip-image branch at imgif.c:790-80

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 91%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-05-15
Last modified	2026-10-26

Publisher (CNA): CPANSec · Vendor: tonyc

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-15 12:17 UTCPublished CVE record published
2026-10-26 14:10 UTCUpdated Record last modified

tonyc imager\ UPGRADE

Affected: < 1.003

Fixed in: 1.003

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy imager || rpm -q imager || imager --version

2. UPGRADE to 1.003 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade imager

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade imager

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-8454?

imager\: upgrade to 1.003. Exact commands for each OS are on this page.

Is CVE-2026-8454 being exploited?

CVE-2026-8454 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-8454 affect?

CVE-2026-8454 affects imager\. Severity is medium (CVSS 5.3). Imager::File::GIF versions through 1.002 for Perl allow a heap out of bounds (OOB) write on crafted multi-frame GIF files. Imager::File::GIF's i_readgif_multi_low allocates a single per-row buffer GifRow sized for the GIF's global screen w

How urgent is CVE-2026-8454?

Priority 21/100. No elevated risk signals yet.

Software pages

Perl vulnerabilities

References

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