Every CVE whose affected-product data names Saitoha Libsixel, ordered by CVSS severity, with EPSS exploit prediction and CISA KEV status.
CVEs (48)
CVE-2019-19636 — CVSS 9.8 (critical): An issue was discovered in libsixel 1.8.2. There is an integer overflow in the function sixel_encode_body at tosixel.c.
CVE-2019-19635 — CVSS 9.8 (critical): An issue was discovered in libsixel 1.8.2. There is a heap-based buffer overflow in the function sixel_decode_raw_impl at fromsixel.c.
CVE-2019-19637 — CVSS 9.8 (critical): An issue was discovered in libsixel 1.8.2. There is an integer overflow in the function sixel_decode_raw_impl at fromsixel.c.
CVE-2019-19638 — CVSS 9.8 (critical): An issue was discovered in libsixel 1.8.2. There is a heap-based buffer overflow in the function load_pnm at frompnm.c, due to an integer…
CVE-2019-20140 — CVSS 8.8 (high): An issue was discovered in libsixel 1.8.4. There is a heap-based buffer overflow in the function gif_out_code at fromgif.c.
CVE-2019-19777 — CVSS 8.8 (high): stb_image.h (aka the stb image loader) 2.23, as used in libsixel and other products, has a heap-based buffer over-read in stbi__load_main.
CVE-2022-27046 — CVSS 8.8 (high): libsixel 1.8.6 suffers from a Heap Use After Free vulnerability in in libsixel/src/dither.c:388.
CVE-2019-19778 — CVSS 8.8 (high): An issue was discovered in libsixel 1.8.2. There is a heap-based buffer over-read in the function load_sixel at loader.c.
CVE-2019-20094 — CVSS 8.8 (high): An issue was discovered in libsixel 1.8.4. There is a heap-based buffer overflow in the function gif_init_frame at fromgif.c.
CVE-2020-21547 — CVSS 8.8 (high): Libsixel 1.8.2 contains a heap-based buffer overflow in the dither_func_fs function in tosixel.c.
CVE-2020-21548 — CVSS 8.8 (high): Libsixel 1.8.3 contains a heap-based buffer overflow in the sixel_encode_highcolor function in tosixel.c.
CVE-2018-19762 — CVSS 7.8 (high): There is a heap-based buffer overflow at fromsixel.c (function: image_buffer_resize) in libsixel 1.8.2 that will cause a denial of service…
CVE-2019-3574 — CVSS 7.8 (high): In libsixel v1.8.2, there is a heap-based buffer over-read in the function load_jpeg() in the file loader.c, as demonstrated by img2sixel.
CVE-2026-33023 — CVSS 7.8 (high): libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. In versions 1.8.7 and prior, when built with the…
CVE-2020-36120 — CVSS 7.5 (high): Buffer Overflow in the "sixel_encoder_encode_bytes" function of Libsixel v1.8.6 allows attackers to cause a Denial of Service (DoS).
CVE-2018-14072 — CVSS 7.5 (high): libsixel 1.8.1 has a memory leak in sixel_decoder_decode in decoder.c, image_buffer_resize in fromsixel.c, and sixel_decode_raw in…
CVE-2026-44636 — CVSS 7.4 (high): libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. From to 1.8.7-r1, signed integer overflow in…
CVE-2026-33021 — CVSS 7.3 (high): libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. Versions 1.8.7 and prior contain a use-after-free…
CVE-2026-44637 — CVSS 7.1 (high): libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. From to 1.8.7-r1, a signed integer overflow in the SIXEL…
CVE-2026-33020 — CVSS 7.1 (high): libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. Versions 1.8.7 and prior contain an integer overflow which…
CVE-2026-33019 — CVSS 7.1 (high): libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. Versions 1.8.7 and prior contain an integer overflow leading…
CVE-2026-33018 — CVSS 7.0 (high): libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. Versions 1.8.7 and prior contain a Use-After-Free…
CVE-2020-21677 — CVSS 6.5 (medium): A heap-based buffer overflow in the sixel_encoder_output_without_macro function in encoder.c of Libsixel 1.8.4 allows attackers to cause a…
CVE-2018-19757 — CVSS 6.5 (medium): There is a NULL pointer dereference at function sixel_helper_set_additional_message (status.c) in libsixel 1.8.2 that will cause a denial…
CVE-2019-20022 — CVSS 6.5 (medium): An invalid memory address dereference was discovered in load_pnm in frompnm.c in libsixel before 1.8.3.
CVE-2019-20024 — CVSS 6.5 (medium): A heap-based buffer overflow was discovered in image_buffer_resize in fromsixel.c in libsixel before 1.8.4.
CVE-2020-11721 — CVSS 6.5 (medium): load_png in loader.c in libsixel.a in libsixel 1.8.6 has an uninitialized pointer leading to an invalid call to free, which can cause a…
CVE-2020-19668 — CVSS 6.5 (medium): Unverified indexs into the array lead to out of bound access in the gif_out_code function in fromgif.c in libsixel 1.8.6.
CVE-2020-21048 — CVSS 6.5 (medium): An issue in the dither.c component of libsixel prior to v1.8.4 allows attackers to cause a denial of service (DOS) via a crafted PNG file.
CVE-2020-21049 — CVSS 6.5 (medium): An invalid read in the stb_image.h component of libsixel prior to v1.8.5 allows attackers to cause a denial of service (DOS) via a crafted…
CVE-2020-21050 — CVSS 6.5 (medium): Libsixel prior to v1.8.3 contains a stack buffer overflow in the function gif_process_raster at fromgif.c.
CVE-2021-46700 — CVSS 6.5 (medium): In libsixel 1.8.6, sixel_encoder_output_without_macro (called from sixel_encoder_encode_frame in encoder.c) has a double free.
CVE-2022-29977 — CVSS 6.5 (medium): There is an assertion failure error in stbi__jpeg_huff_decode, stb_image.h:1894 in libsixel img2sixel 1.8.6. Remote attackers could…
CVE-2022-29978 — CVSS 6.5 (medium): There is a floating point exception error in sixel_encoder_do_resize, encoder.c:633 in libsixel img2sixel 1.8.6. Remote attackers could…
CVE-2018-19759 — CVSS 5.5 (medium): There is a heap-based buffer over-read at stb_image_write.h (function: stbi_write_png_to_mem) in libsixel 1.8.2 that will cause a denial of…
CVE-2018-19756 — CVSS 5.5 (medium): There is a heap-based buffer over-read at stb_image.h (function: stbi__tga_load) in libsixel 1.8.2 that will cause a denial of service.
CVE-2022-27938 — CVSS 5.5 (medium): stb_image.h (aka the stb image loader) 2.19, as used in libsixel and other products, has a reachable assertion in stbi__create_png_image_raw…
CVE-2019-3573 — CVSS 5.5 (medium): In libsixel v1.8.2, there is an infinite loop in the function sixel_decode_raw_impl() in the file fromsixel.c, as demonstrated by sixel2png.
CVE-2018-19763 — CVSS 5.5 (medium): There is a heap-based buffer over-read at writer.c (function: write_png_to_file) in libsixel 1.8.2 that will cause a denial of service.
CVE-2018-19761 — CVSS 5.5 (medium): There is an illegal address access at fromsixel.c (function: sixel_decode_raw_impl) in libsixel 1.8.2 that will cause a denial of service.
CVE-2025-9300 — CVSS 5.3 (medium): A vulnerability was found in saitoha libsixel up to 1.10.3. Affected by this issue is the function sixel_debug_print_palette of the file…
CVE-2025-61146 — CVSS 4.0 (medium): saitoha libsixel until v1.8.7 was discovered to contain a memory leak via the component malloc_stub.c.
CVE-2026-44638 — CVSS 2.5 (low): libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. From to 1.8.7-r1, a wrong NULL check after an allocation…