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CVE-2026-73638 Affecting libimager-perl package, versions *

Severity

 Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.14% (4th percentile)

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  • Snyk IDSNYK-ECHOLATEST-LIBIMAGERPERL-19012622
  • published20 Aug 2026
  • disclosed17 Sept 2026
Report a new vulnerability Found a mistake?

Introduced: 20 Aug 2026

CVE-2026-73638  (opens in a new tab)

How to fix?

There is no fixed version for Echo:latest libimager-perl.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libimager-perl package and not the libimager-perl package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

Imager versions from 0.45_02 before 1.035 for Perl read outside the EXIF block via unchecked start offsets in tiff_load_ifd.

tiff_load_ifd() validates an IFD entry's data by checking that entry->offset + entry->size stays within the EXIF block, and never checks the start offset itself. Where that sum is not the real end of the data, the check passes with the entry starting outside the block.

Through 1.032 entry->offset is a plain int, so on the usual two's-complement implementations an offset with the high bit set converts to negative and the sum can land back inside the block. From 1.033 the field is a size_t and the addition wraps only where size_t is 32 bits. The IFD's own start offset is checked the same way and wraps where unsigned long is 32 bits, which includes 64-bit Windows.

Any caller of Imager->read() on an attacker-supplied image may receive EXIF tags holding bytes from outside the block, or crash the process.