CVE-2026-25556Public exploitNetwork attack vector

Process crash via display-list pixmap double-free

Published Feb 6, 2026 · Updated Feb 6, 2026

Double-free in MuPDF 1.23.0 through 1.27.0 allows remote attackers to crash barcode-enabled applications via crafted input. On a rendering exception, fz_fill_pixmap_from_display_list() drops a caller-owned pixmap before rethrowing, and caller cleanup drops it again. Reachability requires enabled barcode decoding and processing input that triggers a display-list rendering error; the resulting heap corruption can terminate the process.

CVSS severity5.9
Medium
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double-free in MuPDF 1.23.0 through 1.27.0 allows remote attackers to crash barcode-enabled applications via crafted input. On a rendering exception, fz_fill_pixmap_from_display_list() drops a caller-owned pixmap before rethrowing, and caller cleanup drops it again. Reachability requires enabled barcode decoding and processing input that triggers a display-list rendering error; the resulting heap corruption can terminate the process.

The record

CVE
CVE-2026-25556
Published
Feb 6, 2026
Updated
Feb 6, 2026
Vendor
Artifex Software, Inc.
Product
MuPDF
Classifications
CWE-415, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.23.0 <=1.27.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Artifex Software, Inc. · MuPDFversion=1.23.0 <=1.27.0

Published CVSS scores

5.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-415Double Free
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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