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CVE Record

CVE-2026-1776: Camaleon CMS AWS Uploader Authenticated Path Traversal Arbitrary File Read

Camaleon CMS versions 2.4.5.0 through 2.9.0, prior to commit f54a77e, contain a path traversal vulnerability in the AWS S3 uploader implementation that allows authenticated users to read arbitrary files from the web server’s filesystem. The issue occurs in the download_private_file functionality when the application is configured to use the CamaleonCmsAwsUploader backend. Unlike the local uploader implementation, the AWS uploader does not validate file paths with valid_folder_path?, allowing directory traversal sequences to be supplied via the file parameter. As a result, any authenticated user, including low-privileged registered users, can access sensitive files such as /etc/passwd. This issue represents a bypass of the incomplete fix for CVE-2024-46987 and affects deployments using the AWS S3 storage backend.

MediumCVSS 6Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2026-1776 lets a logged-in Camaleon CMS user read files from the server when the site uses the AWS S3 uploader backend. This can expose secrets, configuration files, or operating-system data. It is not remote unauthenticated compromise, but low-privileged accounts may be enough.

Executive priority

Prioritize remediation for any Camaleon CMS site with user registration, customer logins, or shared staff accounts. Treat exposed secrets as plausible until logs and configuration are reviewed.

Technical view

Affected Camaleon CMS versions 2.4.5.0 through 2.9.0 before commit f54a77e lack path validation in AWS uploader download_private_file handling. Unlike the local uploader, it does not apply valid_folder_path?, allowing path traversal through the file parameter. The issue is CWE-22 and bypasses the incomplete CVE-2024-46987 fix.

Likely exposure

Exposure is limited to Camaleon CMS deployments using the CamaleonCmsAwsUploader AWS S3 storage backend, with attacker access to any authenticated account, including low-privileged registered users.

Exploitation context

The source bundle marks KEV as false, and no provided source states active exploitation. The issue is network reachable, low complexity, and authenticated, with high confidentiality impact but no stated integrity or availability impact.

Researcher notes

The key condition is the AWS uploader implementation, not all Camaleon CMS deployments. Validate backend configuration before scoping impact. Evidence supports arbitrary file read by authenticated users, but does not support unauthenticated exploitation or code execution.

Mitigation direction

  • Upgrade or patch to code containing commit f54a77e.
  • Check vendor guidance for an official fixed release or backport.
  • Identify whether CamaleonCmsAwsUploader is enabled on production sites.
  • Restrict low-privileged account access until patched where business allows.
  • Review server secrets that may be readable by the web process.

Validation and detection

  • Inventory Camaleon CMS versions across internet-facing and internal deployments.
  • Confirm whether AWS S3 uploader backend is configured.
  • Verify deployed code includes the f54a77e path validation fix.
  • Review application logs for unusual private file download requests.
  • Retest authorized file downloads after patching to confirm expected behavior.
Prepared
Confidence
high
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-22: File access and web shell behavior lookup

File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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description · low confidence lookup

File access behavior lookup

The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-1776 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6 (4.0)
Known Exploited
No
Published

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
1ADP providers
5Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
6CVSS 4.0MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N——VulnCheck

Vulnerability scoring details

Base CVSS 4.0 score

6Medium
CVSS 4.0 vector shape for CVE-2026-1776Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
owen2345Camaleon CMScamaleon-cms, 2.4.5.0, f54a77e2a7be601215ea1b396038c589a0cab9afunaffected
Weakness

CWE details

CWE-22

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.