How severe is CVE-2026-20618?

CVE-2026-20618 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-20618 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-20618?

CVE-2026-20618 affects Apple Macos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-20618?

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

Does CVE-2026-20618 have an EU (EUVD) identifier?

Yes. CVE-2026-20618 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6228.

When was CVE-2026-20618 published?

CVE-2026-20618 was published on 2026-02-11 and last updated on 2026-06-17.

CVE-2026-20618

CVE-2026-20618 is a medium-severity vulnerability in Apple Macos with a CVSS 3.x base score of 5.5. 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-377.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-6228
Weakness: CWE-377
Affected product: Apple Macos
Published: 2026-02-11
Last modified: 2026-06-17

Description

An issue was addressed with improved handling of temporary files. This issue is fixed in macOS Tahoe 26.3. An app may be able to access user-sensitive data.

Frequently asked questions

What is CVE-2026-20618?: An issue was addressed with improved handling of temporary files. This issue is fixed in macOS Tahoe 26.3. An app may be able to access user-sensitive data.
How severe is CVE-2026-20618?: CVE-2026-20618 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-20618 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-20618?: CVE-2026-20618 affects Apple Macos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-20618?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-20618 have an EU (EUVD) identifier?: Yes. CVE-2026-20618 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6228.
When was CVE-2026-20618 published?: CVE-2026-20618 was published on 2026-02-11 and last updated on 2026-06-17.

References

https://support.apple.com/en-us/126348

Affected products (1)

cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

More vulnerabilities in Apple Macos

CVE-2025-43300 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS…
CVE-2025-24201 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in…
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-2024-44148 — Critical (CVSS 10.0): This issue was addressed with improved validation of file attributes. This issue is fixed in macOS Sequoia 15. An app…
CVE-2024-44146 — Critical (CVSS 10.0): A logic issue was addressed with improved file handling. This issue is fixed in macOS Sequoia 15. An app may be able to…
CVE-2023-40455 — Critical (CVSS 10.0): A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Sonoma 14. A sandboxed…

All CVEs affecting Apple Macos →

Other CWE-377 (Insecure Temporary File) vulnerabilities

CVE-2011-4119 — Critical (CVSS 9.8): caml-light <= 0.75 uses mktemp() insecurely, and also does unsafe things in /tmp during make install.
CVE-2012-2666 — Critical (CVSS 9.8): golang/go in 1.0.2 fixes all.bash on shared machines. dotest() in src/pkg/debug/gosym/pclntab_test.go creates a…
CVE-2015-5224 — Critical (CVSS 9.8): The mkostemp function in login-utils in util-linux when used incorrectly allows remote attackers to cause file name…
CVE-2025-14307 — High (CVSS 8.1): An insecure temporary file creation vulnerability exists in the AutoExtract component of Robocode version 1.9.3.6. The…
CVE-2023-43498 — High (CVSS 8.1): In Jenkins 2.423 and earlier, LTS 2.414.1 and earlier, processing file uploads using MultipartFormDataParser creates…
CVE-2025-46369 — High (CVSS 7.8): Dell Alienware Command Center 6.x (AWCC), versions prior to 6.10.15.0, contains an Insecure Temporary File…

Browse all CWE-377 (Insecure Temporary File) vulnerabilities →