libpng 関連製品全体の CVE とセキュリティ脆弱性情報を集約し、CVSS、EPSS、公開日、脆弱性情報データを掲載しています。
一般的な弱点パターンには バッファオーバーフロー、vendor risk memory corruption、パス処理の欠陥, and vendor risk input validation があり、vendor surface production workloads and vendor surface software deployment の利用場面で vendor impact memory corruption、vendor impact unexpected behavior, and ファイル上書き などのリスクが生じる可能性があります。
掲載データは公開脆弱性情報とセキュリティ公告に基づき、過去の暴露面と修補優先度の評価に利用できます。
| CVE | 概要 | ソース | CVSS 最大値 | EPSS（%） | 公開 | 更新 |
|---|---|---|---|---|---|---|
| CVE-2026-34757 | LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From 1.0.9 to before 1.6.57, passing a pointer obtained from png_get_PLTE, png_get_tRNS, or png_get_hIST back into the corresponding setter on the same png_struct/png_info pair causes the setter to read from freed memory and copy its contents into the replacement buffer. The setter frees the internal buffer before copying from the caller-supplied pointer, wh | [email protected] | 5.1 | 0.01% | 2026-04-09 | 2026-05-13 |
| CVE-2026-33636 | LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. In versions 1.6.36 through 1.6.55, an out-of-bounds read and write exists in libpng's ARM/AArch64 Neon-optimized palette expansion path. When expanding 8-bit paletted rows to RGB or RGBA, the Neon loop processes a final partial chunk without verifying that enough input pixels remain. Because the implementation works backward from the end of the row, the fina | [email protected] | 7.6 | 0.05% | 2026-03-26 | 2026-04-02 |
| CVE-2026-33416 | LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. In versions 1.2.1 through 1.6.55, `png_set_tRNS` and `png_set_PLTE` each alias a heap-allocated buffer between `png_struct` and `png_info`, sharing a single allocation across two structs with independent lifetimes. The `trans_alpha` aliasing has been present since at least libpng 1.0, and the `palette` aliasing since at least 1.2.1. Both affect all prior rel | [email protected] | 7.5 | 0.02% | 2026-03-26 | 2026-04-02 |
| CVE-2026-25646 | LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to 1.6.55, an out-of-bounds read vulnerability exists in the png_set_quantize() API function. When the function is called with no histogram and the number of colors in the palette is more than twice the maximum supported by the user's display, certain palettes will cause the function to enter into an infinite loop that reads past the end of an internal | [email protected] | 8.3 | 0.05% | 2026-02-10 | 2026-02-13 |
| CVE-2025-28164 | Buffer Overflow vulnerability in libpng 1.6.43-1.6.46 allows a local attacker to cause a denial of service via png_create_read_struct() function. | [email protected] | 5.5 | 0.02% | 2026-01-27 | 2026-03-04 |
| CVE-2025-28162 | Buffer Overflow vulnerability in libpng 1.6.43-1.6.46 allows a local attacker to cause a denial of service via the pngimage with AddressSanitizer (ASan), the program leaks memory in various locations, eventually leading to high memory usage and causing the program to become unresponsive | [email protected] | 5.5 | 0.02% | 2026-01-27 | 2026-02-06 |
| CVE-2026-22801 | LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From 1.6.26 to 1.6.53, there is an integer truncation in the libpng simplified write API functions png_write_image_16bit and png_write_image_8bit causes heap buffer over-read when the caller provides a negative row stride (for bottom-up image layouts) or a stride exceeding 65535 bytes. The bug was introduced in libpng 1.6.26 (October 2016) by casts added to | [email protected] | 6.8 | 0.01% | 2026-01-12 | 2026-01-21 |
| CVE-2026-22695 | LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From 1.6.51 to 1.6.53, there is a heap buffer over-read in the libpng simplified API function png_image_finish_read when processing interlaced 16-bit PNGs with 8-bit output format and non-minimal row stride. This is a regression introduced by the fix for CVE-2025-65018. This vulnerability is fixed in 1.6.54. | [email protected] | 6.1 | 0.01% | 2026-01-12 | 2026-01-21 |
| CVE-2025-66293 | LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to 1.6.52, an out-of-bounds read vulnerability in libpng's simplified API allows reading up to 1012 bytes beyond the png_sRGB_base[512] array when processing valid palette PNG images with partial transparency and gamma correction. The PNG files that trigger this vulnerability are valid per the PNG specification; the bug is in libpng's internal state ma | [email protected] | 7.1 | 0.14% | 2025-12-03 | 2025-12-16 |
| CVE-2025-65018 | LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, there is a heap buffer overflow vulnerability in the libpng simplified API function png_image_finish_read when processing 16-bit interlaced PNGs with 8-bit output format. Attacker-crafted interlaced PNG files cause heap writes beyond allocated buffer bounds. This issue has been patched in version 1.6.51. | [email protected] | 7.1 | 0.07% | 2025-11-25 | 2025-11-26 |
| CVE-2025-64720 | LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, an out-of-bounds read vulnerability exists in png_image_read_composite when processing palette images with PNG_FLAG_OPTIMIZE_ALPHA enabled. The palette compositing code in png_init_read_transformations incorrectly applies background compositing during premultiplication, violating the invariant component ≤ alpha × 257 requ | [email protected] | 7.1 | 0.05% | 2025-11-25 | 2025-11-26 |
| CVE-2025-64506 | LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, a heap buffer over-read vulnerability exists in libpng's png_write_image_8bit function when processing 8-bit images through the simplified write API with convert_to_8bit enabled. The vulnerability affects 8-bit grayscale+alpha, RGB/RGBA, and images with incomplete row data. A conditional guard incorrectly allows 8-bit inp | [email protected] | 6.1 | 0.01% | 2025-11-25 | 2025-11-26 |
| CVE-2025-64505 | LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to version 1.6.51, a heap buffer over-read vulnerability exists in libpng's png_do_quantize function when processing PNG files with malformed palette indices. The vulnerability occurs when palette_lookup array bounds are not validated against externally-supplied image data, allowing an attacker to craft a PNG file with out-of-range palette indices that | [email protected] | 6.1 | 0.01% | 2025-11-25 | 2025-11-26 |
| CVE-2021-4214 | A heap overflow flaw was found in libpngs' pngimage.c program. This flaw allows an attacker with local network access to pass a specially crafted PNG file to the pngimage utility, causing an application to crash, leading to a denial of service. | [email protected] | 5.5 | 0.13% | 2022-08-24 | 2024-11-21 |
| CVE-2020-35511 | A global buffer overflow was discovered in pngcheck function in pngcheck-2.4.0(5 patches applied) via a crafted png file. | [email protected] | 7.8 | 0.07% | 2022-08-23 | 2024-11-21 |
| CVE-2020-27818 | A flaw was found in the check_chunk_name() function of pngcheck-2.4.0. An attacker able to pass a malicious file to be processed by pngcheck could cause a temporary denial of service, posing a low risk to application availability. | [email protected] | 3.3 | 0.16% | 2020-12-08 | 2024-11-21 |
| CVE-2017-12652 | libpng before 1.6.32 does not properly check the length of chunks against the user limit. | [email protected] | 9.8 | 0.63% | 2019-07-10 | 2025-06-09 |
| CVE-2018-14550 | An issue has been found in third-party PNM decoding associated with libpng 1.6.35. It is a stack-based buffer overflow in the function get_token in pnm2png.c in pnm2png. | [email protected] | 8.8 | 1.83% | 2019-07-10 | 2024-11-21 |
| CVE-2019-7317 | png_image_free in png.c in libpng 1.6.x before 1.6.37 has a use-after-free because png_image_free_function is called under png_safe_execute. | [email protected] | 5.3 | 0.56% | 2019-02-04 | 2026-05-28 |
| CVE-2019-6129 | png_create_info_struct in png.c in libpng 1.6.36 has a memory leak, as demonstrated by pngcp. NOTE: a third party has stated "I don't think it is libpng's job to free this buffer. | [email protected] | 6.5 | 0.28% | 2019-01-11 | 2026-05-28 |