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CVE Record

CVE-2020-36328: A flaw was found in libwebp in versions before 1.0.1.

A flaw was found in libwebp in versions before 1.0.1. A heap-based buffer overflow in function WebPDecodeRGBInto is possible due to an invalid check for buffer size. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

libwebp, an image decoding library, had a heap buffer overflow before version 1.0.1. Vulnerable software could mishandle memory while decoding WebP images, risking data exposure, tampering, or crashes. The bundle confirms vendor updates but provides no CVSS score or active exploitation evidence.

Executive priority

Prioritize environments processing untrusted images or running older vendor packages. The bug can affect confidentiality, integrity, and availability, but the source evidence lacks CVSS and active exploitation. Focus on inventorying libwebp dependencies and applying vendor security updates.

Technical view

CWE-787 heap-based buffer overflow in WebPDecodeRGBInto caused by an invalid output buffer size check in libwebp before 1.0.1. Impact includes confidentiality, integrity, and availability. Exposure depends on applications or products bundling libwebp; cited advisories include Debian security updates and downstream Apple and NetApp notices.

Likely exposure

Any software, server workflow, mobile or desktop product, or appliance that includes libwebp before 1.0.1 and decodes WebP images. Exposure may be indirect through OS packages or bundled third-party components. The sources do not enumerate all affected products.

Exploitation context

The bundle does not show KEV listing or active exploitation. Plausible exposure requires vulnerable libwebp reachable through WebP decoding, but the sources do not provide exploitation details. Treat untrusted image handling as the main area to verify.

Researcher notes

Evidence is limited to the CVE description and vendor advisories. Confirm exact affected and fixed versions per distribution because backported security fixes may not match upstream 1.0.1 numbering. Do not infer active exploitation from Apple or NetApp advisory presence alone.

Mitigation direction

  • Update libwebp to 1.0.1 or a vendor-supported fixed package.
  • Apply Debian, Apple, NetApp, or other vendor advisories where relevant.
  • Inventory applications and appliances that bundle libwebp, not just OS packages.
  • Restrict workflows processing untrusted WebP files until vulnerable components are patched.
  • Monitor vendor guidance for product-specific fixes not listed in the bundle.

Validation and detection

  • Check package managers and SBOMs for libwebp versions before 1.0.1.
  • Confirm applicable Debian security updates or vendor platform fixes are installed.
  • Review applications that decode user-supplied images for bundled libwebp copies.
  • Verify scanners map CVE-2020-36328 to libwebp and downstream vendor packages.
  • Document systems where WebP processing is disabled, isolated, or absent.
Prepared
Confidence
medium
Sources
8

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

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cwe · low confidence lookup

CWE-787: Exact CWE lookup

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cve · low confidence lookup

CVE-2020-36328 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
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.

0CVSS vectors
0Timeline events
0ADP providers
7Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/alibwebplibwebp 1.0.1Listed
Weakness

CWE details

CWE-787

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

CWE-787 · source CWE mapping

Out-of-bounds Write

Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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