CVE-2026-36849 is a denial-of-service vulnerability in libtiff affecting version 4.7.1 and earlier. According to the provided disclosure, the issue can be triggered by supplying a crafted TIFF file containing an excessively large SamplesPerPixel tag value. The available context does not identify the exact vulnerable function or code path, but indicates that improper handling of this tag during TIFF parsing can cause the application or library consumer to enter a failure condition resulting in denial of service.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
2 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.