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CVE Record

CVE-2026-3029: CVE-2026-3029

A path traversal and arbitrary file write vulnerability exist in the embedded get function in '_main_.py' in PyMuPDF version, 1.26.5.

HighCVSS 8.2Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

PyMuPDF 1.26.5 is reported to allow path traversal leading to arbitrary file writes. In business terms, a vulnerable workflow could let a lower-privileged local actor influence where files are written after user interaction, potentially affecting sensitive data, integrity, and system availability.

Executive priority

High priority for teams using PyMuPDF 1.26.5 in business workflows. The strongest action is rapid inventory, exposure scoping, and vendor-guided remediation, rather than emergency assumptions about active exploitation.

Technical view

The source bundle describes CWE-22 path traversal and arbitrary file write in the embedded get function in _main_.py for PyMuPDF 1.26.5. CVSS 3.1 is 8.2 with local attack vector, low complexity, low privileges required, user interaction required, changed scope, and high confidentiality, integrity, and availability impact.

Likely exposure

Exposure is likely limited to environments that package or run PyMuPDF version 1.26.5, especially where local users or workflows can trigger PyMuPDF processing. The provided sources do not establish broader product impact beyond PyMuPDF 1.26.5.

Exploitation context

The bundle does not cite CISA KEV listing or public active exploitation. Treat this as high risk because arbitrary file write can be serious, but do not assume exploitation in the wild from the provided evidence.

Researcher notes

Evidence is concise and does not include exploit details, fixed versions, or confirmed real-world exploitation. The CVSS vector indicates local execution conditions with required interaction and high impact. Validate affected status against actual dependency use and vendor advisories.

Mitigation direction

  • Inventory systems and applications for PyMuPDF version 1.26.5.
  • Check Artifex, CERT/CC, and Red Hat guidance for fixed versions or vendor mitigations.
  • Prioritize remediation on systems handling untrusted or user-influenced documents.
  • Restrict vulnerable workflows to trusted users until vendor guidance is applied.
  • Update dependency locks, container images, and SBOM records after remediation.

Validation and detection

  • Confirm installed PyMuPDF versions in package manifests, SBOMs, and runtime images.
  • Identify applications or jobs that invoke PyMuPDF in user-influenced workflows.
  • Review CERT/CC and Red Hat records for updated affected-status or fix information.
  • Verify remediation by confirming PyMuPDF 1.26.5 is absent where exposure exists.
  • Document exceptions where vendor guidance says a product is not affected.
Prepared
Confidence
medium
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.

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cve · low confidence lookup

CVE-2026-3029 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
High
CVSS
8.2 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

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.

2CVSS vectors
5Timeline events
3ADP providers
5Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: total

CVSS vector scores

2 official scores

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
8.2CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H1.56redhat-SADP
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

8.2High
CVSS 3.1 vector shape for CVE-2026-3029Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
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. ADP timelineredhat-SADP

    Made public.

  3. CVE publishedCVE Program

    The CVE record was published.

  4. ADP timelineredhat-SADP

    Reported to Red Hat.

  5. CVE updatedCVE Program

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

ADP provider summaries

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc
redhat-SADPPyMuPDF: PyMuPDF: Arbitrary file write via path traversal vulnerability
other:Red Hat severity ratingcvssV3_1
  • 2026-03-19T16:02:03.012Z: Reported to Red Hat.
  • 2026-03-19T15:53:38.778Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Artifex Software Inc. *PyMuPDF*PyMuPDF1.26.5Listed
Weakness

CWE details

CWE-22

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

CWE-22 · source CWE mapping

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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