# Saitoha Libsixel vulnerabilities

Source: https://junglewise.ai/threats/technologies/libsixel  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 11 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/libsixel.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 8 vulnerabilities in Saitoha Libsixel: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-44638, was published on 14 May 2026.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 8 (0 critical, 0 exploited in the wild)

## About Saitoha Libsixel

C library for encoding and decoding Sixel image format for terminal graphics.

## Latest Saitoha Libsixel vulnerabilities

- [CVE-2026-44638: saitoha libsixel NULL pointer dereference in sixel_decode_raw](https://junglewise.ai/threats/cve-2026-44638-saitoha-libsixel-null-pointer-dereference-in-sixel-decode-raw) (low, CVSS 2.5, published 14 May 2026)
- [CVE-2026-44637: saitoha libsixel integer overflow in SIXEL parser](https://junglewise.ai/threats/cve-2026-44637-saitoha-libsixel-integer-overflow-in-sixel-parser) (high, CVSS 7.1, published 14 May 2026)
- [CVE-2026-44636: saitoha libsixel heap buffer overflow in sixel_encode_highcolor](https://junglewise.ai/threats/cve-2026-44636-saitoha-libsixel-heap-buffer-overflow-in-sixel-encode-highcolor) (high, CVSS 7.4, published 14 May 2026)
- [CVE-2026-33023: saitoha libsixel use-after-free in load_with_gdkpixbuf](https://junglewise.ai/threats/cve-2026-33023-saitoha-libsixel-use-after-free-in-load-with-gdkpixbuf) (high, CVSS 7.8, published 14 Apr 2026)
- [CVE-2026-33021: saitoha libsixel use-after-free in sixel_encoder_encode_bytes](https://junglewise.ai/threats/cve-2026-33021-saitoha-libsixel-use-after-free-in-sixel-encoder-encode-bytes) (high, CVSS 7.3, published 14 Apr 2026)
- [CVE-2026-33020: saitoha libsixel heap overflow in sixel_frame_convert_to_rgb888](https://junglewise.ai/threats/cve-2026-33020-saitoha-libsixel-heap-overflow-in-sixel-frame-convert-to-rgb888) (high, CVSS 7.1, published 14 Apr 2026)
- [CVE-2026-33019: saitoha libsixel integer overflow in img2sixel crop handling](https://junglewise.ai/threats/cve-2026-33019-saitoha-libsixel-integer-overflow-in-img2sixel-crop-handling) (high, CVSS 7.1, published 14 Apr 2026)
- [CVE-2026-33018: saitoha libsixel use-after-free in load_gif](https://junglewise.ai/threats/cve-2026-33018-saitoha-libsixel-use-after-free-in-load-gif) (high, CVSS 7, published 14 Apr 2026)

## Most severe Saitoha Libsixel vulnerabilities

- [CVE-2026-33023: saitoha libsixel use-after-free in load_with_gdkpixbuf](https://junglewise.ai/threats/cve-2026-33023-saitoha-libsixel-use-after-free-in-load-with-gdkpixbuf) (high, CVSS 7.8, published 14 Apr 2026)
- [CVE-2026-44636: saitoha libsixel heap buffer overflow in sixel_encode_highcolor](https://junglewise.ai/threats/cve-2026-44636-saitoha-libsixel-heap-buffer-overflow-in-sixel-encode-highcolor) (high, CVSS 7.4, published 14 May 2026)
- [CVE-2026-33021: saitoha libsixel use-after-free in sixel_encoder_encode_bytes](https://junglewise.ai/threats/cve-2026-33021-saitoha-libsixel-use-after-free-in-sixel-encoder-encode-bytes) (high, CVSS 7.3, published 14 Apr 2026)
- [CVE-2026-33019: saitoha libsixel integer overflow in img2sixel crop handling](https://junglewise.ai/threats/cve-2026-33019-saitoha-libsixel-integer-overflow-in-img2sixel-crop-handling) (high, CVSS 7.1, published 14 Apr 2026)
- [CVE-2026-33020: saitoha libsixel heap overflow in sixel_frame_convert_to_rgb888](https://junglewise.ai/threats/cve-2026-33020-saitoha-libsixel-heap-overflow-in-sixel-frame-convert-to-rgb888) (high, CVSS 7.1, published 14 Apr 2026)
- [CVE-2026-44637: saitoha libsixel integer overflow in SIXEL parser](https://junglewise.ai/threats/cve-2026-44637-saitoha-libsixel-integer-overflow-in-sixel-parser) (high, CVSS 7.1, published 14 May 2026)
- [CVE-2026-33018: saitoha libsixel use-after-free in load_gif](https://junglewise.ai/threats/cve-2026-33018-saitoha-libsixel-use-after-free-in-load-gif) (high, CVSS 7, published 14 Apr 2026)
- [CVE-2026-44638: saitoha libsixel NULL pointer dereference in sixel_decode_raw](https://junglewise.ai/threats/cve-2026-44638-saitoha-libsixel-null-pointer-dereference-in-sixel-decode-raw) (low, CVSS 2.5, published 14 May 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Saitoha Libsixel vulnerabilities", https://junglewise.ai/threats/technologies/libsixel, 11 November 2026.