Is there a public exploit for CVE-2026-96637?

No public exploit for CVE-2026-96637 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-96637?

CVE-2026-96637 scores CVSS 7.1 (v4.0), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.37%.

What does CVE-2026-96637 affect?

CVE-2026-96637 affects python-pillow Pillow.

7.1 High

Pillow is a Python imaging library.

CVE-2026-96637

Pillow is a Python imaging library. Prior to 13.0.0, SpiderImageFile.seek() in src/PIL/SpiderImagePlugin.py reparses a later SPIDER stack frame and replaces self.size without rerunning Image.decompressionbombcheck(). A tiny file can use a safe first frame to pass Image.open() and then declare very large dimensions in a later mode F frame. Loading that frame allocates approximately four bytes per attacker-declared pixel and can consume multiple gigabytes of memory. This issue is fixed in version 13.0.0.

Assessment

CVSS: 7.1 (v4.0)
Severity: High
EPSS: 0.37% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 21 October 2026
Last updated: 27 October 2026
Affected: python-pillow · Pillow
Weakness: CWE-400, CWE-409
Assigner: security-advisories@github.com

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

At the source

References

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