Imager versions before 1.032 for Perl have a heap out-of-bounds read in the bundled Imager::File::SGI reader via a 16-bit RLE literal run in readrgb16_rle.
readrgb16rle guards each literal run with if (count > dataleft), but count is a pixel count while every 16-bit sample consumes two bytes. The copy loop reads inp[0] * 256 + inp[1] and advances two bytes per pixel, so a run with dataleft / 2 < count <= dataleft passes the guard yet consumes 2 * count bytes and reads past the end of the buffer. The 8-bit path is unaffected because there one pixel is one byte.
Reading a crafted SGI image through Imager->read triggers the over-read before the parser rejects the malformed image, which can crash the process.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/13xxx/CVE-2026-13705.json",
"cwe_ids": [
"CWE-125"
],
"cna_assigner": "CPANSec"
}[
{
"id": "CVE-2026-13705-33c2fbab",
"target": {
"function": "read_rgb_16_rle",
"file": "SGI/imsgi.c"
},
"deprecated": false,
"digest": {
"function_hash": "49065784019816711005909374849919242972",
"length": 3166.0
},
"signature_version": "v1",
"source": "https://github.com/tonycoz/imager/commit/f28de02770dfc26ffbdc32048970ed84babbf730",
"signature_type": "Function"
}
]
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-13705.json"
"2026-08-12T15:31:22Z"