CVE-2018-1000039

CVE-2018-1000039 is a medium-severity vulnerability in Artifex Mupdf with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.

Key facts

• Severity: Medium (CVSS 3.x base score 6.3)
• CVSS v2: 6.8
• EPSS exploit prediction: 2% (77th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-416
• Affected product: Artifex Mupdf
• Published: 2018-05-24
• Last modified: 2026-06-17

Description

In Artifex MuPDF 1.12.0 and earlier, multiple heap use after free bugs in the PDF parser could allow an attacker to execute arbitrary code, read memory, or cause a denial of service via a crafted file.

Frequently asked questions

What is CVE-2018-1000039?

In Artifex MuPDF 1.12.0 and earlier, multiple heap use after free bugs in the PDF parser could allow an attacker to execute arbitrary code, read memory, or cause a denial of service via a crafted file.

How severe is CVE-2018-1000039?

CVE-2018-1000039 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2018-1000039 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1000039?

CVE-2018-1000039 affects Artifex Mupdf. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-1000039?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-1000039 published?

CVE-2018-1000039 was published on 2018-05-24 and last updated on 2026-06-17.

References

• http://git.ghostscript.com/?p=mupdf.git%3Ba=commitdiff%3Bh=4dcc6affe04368461310a21238f7e1871a752a05%3Bhp=8ec561d1bccc46e9db40a9f61310cd8b3763914e
• http://git.ghostscript.com/?p=mupdf.git%3Ba=commitdiff%3Bh=71ceebcf56e682504da22c4035b39a2d451e8ffd%3Bhp=7f82c01523505052615492f8e220f4348ba46995
• http://git.ghostscript.com/?p=mupdf.git%3Ba=commitdiff%3Bh=f597300439e62f5e921f0d7b1e880b5c1a1f1607%3Bhp=093fc3b098dc5fadef5d8ad4b225db9fb124758b
• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5492
• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5513
• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5521
• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5604
• https://bugs.ghostscript.com/show_bug.cgi?id=698883
• https://bugs.ghostscript.com/show_bug.cgi?id=698888
• https://bugs.ghostscript.com/show_bug.cgi?id=698891
• https://bugs.ghostscript.com/show_bug.cgi?id=698892
• https://bugs.ghostscript.com/show_bug.cgi?id=698901
• https://security.gentoo.org/glsa/201811-15

Affected products (1)

• cpe:2.3:a:artifex:mupdf:*:*:*:*:*:*:*:*

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Other CWE-416 (Use After Free) vulnerabilities

• CVE-2026-13782 — Critical (CVSS 10.0): Use after free in Browser in Google Chrome prior to 150.0.7871.47 allowed a remote attacker who had compromised the…
• CVE-2026-4725 — Critical (CVSS 10.0): Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149…
• CVE-2026-4688 — Critical (CVSS 10.0): Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox…
• CVE-2025-24085 — Critical (CVSS 10.0): A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.3 and iPadOS 18.3,…
• CVE-2024-43102 — Critical (CVSS 10.0): Concurrent removals of certain anonymous shared memory mappings by using the UMTX_SHM_DESTROY sub-request of…
• CVE-2021-32495 — Critical (CVSS 10.0): Radare2 has a use-after-free vulnerability in pyc parser's get_none_object function. Attacker can read freed memory…

Browse all CWE-416 (Use After Free) vulnerabilities →