CVE-2026-6807
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 · uneditedA vulnerability in GRASSMARLIN v3.2.1 allows crafted session data to trigger improper handling of XML input, which may result in unintended exposure of sensitive information. The flaw stems from insufficient hardening of the XML parsing 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 confidenceGRASSMARLIN v3.2.1 contains a vulnerability where crafted session data triggers improper handling of XML input, allowing potential exposure of sensitive information. The root cause is insufficient hardening of the XML parsing process, likely allowing XML External Entity (XXE) injection or similar XML-based attacks.
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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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 if GRASSMARLIN is installedSearch for GRASSMARLIN installation directories, process lists, or installed software listings. Look for grassmarlin, GrassMarlin, or related executable names.Affected if GRASSMARLIN is found running or installed on the system
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Determine the installed GRASSMARLIN versionCheck the application's about section, version file, or examine the executable's properties/metadata. Common locations include the installation directory or within the application JAR/lib folders.Affected if The version is 3.2.1 or if the version cannot be determined but GRASSMARLIN is present
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Locate session data storageSearch for session-related files, configurations, or databases where GRASSMARLIN stores session data. Look for files with extensions like .xml, .session, or similar in the application's data directory.Affected if XML-based session files or configurations exist on the system
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Inspect XML parser configurationExamine GRASSMARLIN configuration files, properties files, or source code for XML parsing settings. Look for XML parser initialization code and check whether external entity processing is explicitly disabled.Affected if XML parser configuration allows external entities, DTD processing, or lacks secure XML parser settings
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Check for XXE indicators in logs or network trafficReview application logs for XXE-related errors, unexpected file access attempts, or anomalous network connections that may indicate XML external entity exploitation.Affected if Logs show XML parsing errors, unusual file access patterns, or signs of XXE attempts
A system is affected if GRASSMARLIN version 3.2.1 is installed and XML session data processing is enabled without secure XML parser hardening.
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 dataHarden XML parsing by disabling external entities, DTD processing, and using a secure XML parser configuration. Validate and sanitize all session data before XML parsing.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-6807 — 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-2026-6807 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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- 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
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