CVE-2026-112894High· 8.7▾ TwilightPillow is a Python imaging library. From 5.1.0 until 13.0.0, Pillow takes quadratic time to reserve PDF object identifiers when saving many frames with save_all enabled. PdfParser.next_object_id() repeatedly rebuilds and scans all previo…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 47.8 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Pillow is a Python imaging library. From 5.1.0 until 13.0.0, Pillow takes quadratic time to reserve PDF object identifiers when saving many frames with save_all enabled. PdfParser.next_object_id() repeatedly rebuilds and scans all previously reserved identifiers for every object. An attacker can supply a multi-frame image, including a small APNG with a large declared frame count, to an application that converts it to a multipage PDF. This can consume excessive CPU and deny service. This issue is fixed in version 13.0.0.
Pillow >= 5.1.0, < 13.0.0Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-112401Medium· 6.9Pillow: Quadratic GIF comment concatenation allows DoS in Image.open()
CVE-2026-112891Medium· 6.9Pillow: Quadratic GIF comment copying during save
CVE-2026-112900Critical· 9.2Pillow: Argument Injection in Ghostscript call, potentially leading into RCE
CVE-2026-112893High· 8.2Pillow: Invalid free in FreeType glyph rendering when a stroker is active
CVE-2026-112895High· 8.7Pillow: Unbounded recursion parsing a PDF page tree or trailer chain (incomplete fix for CVE-2026-42310)
CVE-2026-112897High· 8.7Pillow: TiffDecode returns uninitialized memory as pixels for short JPEG strips