Cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*

A denial-of-service vulnerability (CVE-2026-59200) exists in Pillow's `PdfParser.PdfStream.decode()` function across versions 5.1.0 to 12.2.x, allowing an unauthenticated attacker to craft a malicious PDF file that, when processed by a vulnerable application, triggers excessive memory allocation (e.g., a ~950 KB file expanding to 1 GB), leading to server Out-of-Memory termination or severe service degradation.

A vulnerability in Pillow's `PcfFontFile._load_bitmaps()` function allows for a decompression bomb check bypass when loading PCF fonts. Attacker-controlled glyph dimensions from the PCF `METRICS` section are passed directly to `Image.frombytes()` without validation, leading to excessive memory allocation. This can be exploited to cause denial of service (resource exhaustion) through either persistent attacks by providing matching bitmap data or transient attacks by providing a small PCF file with large declared dimensions, leading to a large C-heap buffer allocation before an exception. Systems loading PCF fonts from untrusted sources are at risk.

A vulnerability, CVE-2026-54060, in the Pillow library's `FontFile.compile()` method allows attackers to craft malicious BDF or PCF font files that bypass standard decompression bomb checks, causing an unchecked, massive memory allocation when processed, which can lead to a Denial of Service (DoS) via an Out-Of-Memory (OOM) crash in vulnerable applications.

A vulnerability (CVE-2026-55379) in Pillow's BdfFontFile component allows attackers to craft a malicious BDF font file with oversized BBX dimensions and an empty BITMAP section, bypassing documented decompression bomb protection and causing the Image.new() function to silently allocate large amounts of memory in the C-heap, leading to resource exhaustion and denial-of-service for applications processing untrusted BDF fonts.

A denial-of-service vulnerability, CVE-2026-59203, exists in the Python imaging library Pillow, affecting versions 12.0.0 through 12.2.0, where a specially crafted EPS file with a negative byte count in the `%%BeginBinary` directive can cause an infinite loop and resource exhaustion when processed by the `Image.open()` function, leading to application unresponsiveness.

A critical out-of-bounds read vulnerability, CVE-2026-59198, exists in Pillow versions 5.2.0 through 12.2.x, specifically within its TGA RLE encoder, allowing adjacent process heap bytes to be copied into generated TGA files, which can lead to information disclosure.

A denial-of-service vulnerability, CVE-2026-59204, exists in the Pillow Python imaging library versions 8.2.0 through 12.2.0, allowing a remote attacker to trigger an out-of-memory error and crash applications by processing a specially crafted tiled JPEG2000 image.