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CVE-2026-62254medium5.5

LibreDWG: excessive class-decoding reallocation in R13-R2000 DWG parsing

Impact

LibreDWG versions prior to 0.14 are vulnerable to denial of service via excessive class-decoding reallocation when parsing specially crafted R13-R2000 DWG files. The issue is caused by uncontrolled resource consumption and memory allocation with excessive size value. Local access is required to exploit this weakness.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

LibreDWG · GitHub_M

libredwg

1 range
GitHub_M version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

< 0.14

unaffected

unknown

Other versions: unknown

Original source description

LibreDWG is a free C library to read and write DWG files. Prior to 0.14, a specially crafted R13-R2000 DWG can trigger algorithmic resource exhaustion in decode_R13_R2000 in src/decode.c. The class-decoding loop performs realloc on every iteration without a sanity check on num_classes. Manipulating that field forces an extremely slow allocation loop and denial of service when the file is parsed. Running the parser in a sandbox with memory limits is a workaround rather than a remediation. This issue is fixed in version 0.14.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-62254

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-400 ↗

CWE-400: Uncontrolled Resource Consumption

GitHub_M

Related →
CWE-789 ↗

CWE-789: Memory Allocation with Excessive Size Value

GitHub_M

Related →
Contributing organizations · 2
GitHub_M

Assigning organization

2026-10-30
CISA-ADP

Additional data publisher

2026-10-30

What changed

Follow changes
  1. CVE · CVE-2026-62254

    Observed 2026-10-30T22:16:56.686Z · upstream updated 2026-10-30T22:12:55.917Z

    Prioritization updated

    before

    []

    after

    [
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-10-30T21:18:19.876055Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "partial"
      }
    ]
  }
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.

References

4 sources
github.com/LibreDWG/libredwg/security/advisories/GHSA-gp83-hcvh-g255
Security advisoryGitHub_M
github.com/LibreDWG/libredwg/issues/1261
Source referenceGitHub_M
github.com/LibreDWG/libredwg/commit/9de893a2e395ff5ac104a46cca54c5e2cf8f02cf
PatchGitHub_M
github.com/LibreDWG/libredwg/releases/tag/0.14
Release notesGitHub_M