CVE-2026-40505
Description
MuPDF before 1.27 contains an ANSI injection vulnerability in mutool that allows attackers to inject arbitrary ANSI escape sequences through crafted PDF metadata fields. Attackers can embed malicious ANSI escape codes in PDF metadata that are passed unsanitized to terminal output when running mutool info, enabling them to manipulate terminal display for social engineering attacks such as presenting fake prompts or spoofed commands.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-40505
Vendor advisory: disclosure@vulncheck.com — https://github.com/ArtifexSoftware/mupdf/commit/0f17d789fe8c29b41e47663be82514aaca3a4dfb
Vendor advisory: disclosure@vulncheck.com — https://cgit.ghostscript.com/cgi-bin/cgit.cgi/mupdf.git/commit/?id=0f17d789fe8c29b41e47663be82514aaca3a4dfb
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | affected | |
| debian | bullseye | affected | |
| debian | forky | fixed | 1.27.0+ds1-5 |
| debian | sid | fixed | 1.27.0+ds1-5 |
| debian | trixie | affected | |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| artifex | mupdf | {"endExcluding":"1.27.0"} | 1.27.0 |
References
- https://cgit.ghostscript.com/cgi-bin/cgit.cgi/mupdf.git/commit/?id=0f17d789fe8c29b41e47663be82514aaca3a4dfb
- https://github.com/ArtifexSoftware/mupdf/commit/0f17d789fe8c29b41e47663be82514aaca3a4dfb
- https://github.com/ArtifexSoftware/mupdf/releases/tag/1.27.0
- https://www.vulncheck.com/advisories/mupdf-mutool-ansi-injection-via-metadata
- https://security-tracker.debian.org/tracker/CVE-2026-40505
CWEs
CWE-150
Verify integrity in audit chain (admin only). AS-IS.