4.8

CVE-2026-40505: artifex software inc. mupdf

CVSS: 4.8v4.0MediumAnalyzed
AliasesUBUNTU-CVE-2026-40505DEBIAN-CVE-2026-40505
Published 16-04-2026Last modified 14-07-2026
Open JSON

Vulnerability summary

CVE-2026-40505 is a medium (CVSS 4.8) vulnerability in artifex software inc. mupdf. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 7.8% of scored vulnerabilities.

Overall risk
19/100
0100
Low · default modelHow is this calculated?
CVSS score
4.8/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.19%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 16-04-2026
    PublishedVulnerability first disclosed.
  2. 14-07-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

7 scores · 4 sources · 2 versions

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

+0.02 pp

From 0.17% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.19%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Artifex1 product
Artifex software inc.1 product
  • mupdf< 1.27.0 | 0f17d789fe8c29b41e47663be82514aaca3a4dfb
Debian1 product
  • mupdfAll versions (No fix recorded) | < 1.27.0+ds1-5
Ubuntu1 product
  • mupdfAll versions (No fix recorded)

4 vendors · 4 products

References

8 links