CVE-2026-42958
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe application contains a use-after-free vulnerability that can be exploited to cause memory corruption while parsing specially crafted files. This could allow an attacker to execute arbitrary code in the context of the current process.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceThis is a use-after-free vulnerability in the application's file parsing logic. When parsing specially crafted files, the application frees memory but continues to use a pointer to that freed memory region, leading to memory corruption. An attacker can exploit this condition to achieve arbitrary code execution within the context of the current process.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the application that performs file parsing in your environmentReview your installed software and identify applications that process or parse files as a core function. Consult vendor documentation or release notes if available to confirm which product relates to this CVE.Affected if The application handling file parsing matches the affected product and version from vendor guidance.
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Determine the installed version of the file parsing applicationUse the application's built-in version command, check the binary or executable properties, or review installation logs. Common methods: --version flag, Help > About menu, or checking file metadata.Affected if The installed version falls within any affected version range once published by the vendor.
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Confirm file parsing functionality is actively used or enabledReview application configuration, enabled plugins, or active modules. Check if the application is configured to automatically process or parse incoming files, or if users routinely open untrusted files.Affected if File parsing features are enabled and the application processes files from users or external sources.
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Inspect for indicators of exploitation or anomalous process behaviorReview application logs for errors related to memory corruption, crashes, or unexpected behavior during file processing. Monitor for sudden process exits or unusual memory usage patterns.Affected if Logs or system monitoring reveal crashes, memory errors, or unexpected process behavior during file operations.
You are affected if the application that performs file parsing in your environment matches the affected product and version, and file parsing functionality is enabled or processing files from external sources.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpdate the affected application to the latest version once a patch is available. Until then, restrict file processing to trusted sources and monitor for anomalous process behavior.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-42958 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-42958 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data