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CVE-2026-18495.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSMEDIUM / 6.1CVSS 3.1 · secalert@redhat.com
EXPLOITATION STATUSNot listed in the cached KEV catalogThis does not establish absence of exploitation.
RECORD STATUSAwaiting AnalysisModified Oct 07, 2026

Disclosure summary

A flaw was found in libtiff. A heap-buffer overflow vulnerability exists in the `tiff2pdf` utility due to an integer truncation error when processing crafted BigTIFF files. An attacker can provide a specially crafted BigTIFF file, causing a 64-bit `StripByteCounts` value to be truncated to a 32-bit integer. This leads to an undersized memory allocation and a subsequent out-of-bounds memory copy, resulting in a crash and severe memory corruption.

Source-reported weakness categories

CWE-122

Source-specific records & product guidance

Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.

NIST National Vulnerability Database · NVD-CVE-2026-18495

Open original source · Updated Oct 07, 2026

Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.

Original records & references

PUBLISHED 2026-09-11T14:16:56-04:00
MODIFIED 2026-10-07T14:17:19-04:00
INGESTED 2026-10-10T20:25:12-04:00