CVE-2020-36329

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-24. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2.3%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in libwebp in versions before 1.0.1. A use-after-free was found due to a thread being killed too early. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
50
EG Risk 50/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation2% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
2.3%
EPSS %ILE
82nd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

May 21, 2021

Last Modified

November 21, 2024

Advisory Details (7)

Auto-updated Oct 4, 2026
Patch available. Sources: redhat.
generic Patch Available

[SECURITY] [DLA 2672-1] libwebp security update

https://lists.debian.org/debian-lts-announce/2021/06/msg00005.html
redhat Patch Available

1956843 – (CVE-2020-36329) CVE-2020-36329 libwebp: use-after-free in EmitFancyRGB() in dec/io_dec.c

Affected: Red Hat Enterprise Linux 7

https://bugzilla.redhat.com/show_bug.cgi?id=1956843
generic

Full Disclosure: APPLE-SA-2021-07-21-1 iOS 14.7 and iPadOS 14.7

http://seclists.org/fulldisclosure/2021/Jul/54
generic

[SECURITY] [DSA 4930-1] libwebp security update

https://www.debian.org/security/2021/dsa-4930
generic

About the security content of iOS 14.7 and iPadOS 14.7 - Apple Support

https://support.apple.com/kb/HT212601
generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20211112-0001/
generic Patch Available

[SECURITY] [DLA 2677-1] libwebp security update

https://lists.debian.org/debian-lts-announce/2021/06/msg00006.html

Vendor Advisories for CVE-2020-36329(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(8)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuwebp (0.4.4-1ubuntu0.1~esm1) @ xenial2026-05-26ubuntu
ubuntulibwebpdemux2 (0.6.1-2ubuntu0.21.04.1) @ hirsute2026-05-26ubuntu
redhatrhmtc/openshift-velero-plugin-rhel8:v1.4.6-42021-07-21redhat
redhatlibwebp-0:1.0.0-3.el8_42021-06-09redhat
redhatlibwebp-0:1.0.0-4.el8_12021-06-09redhat
redhatlibwebp-0:1.0.0-4.el8_22021-06-09redhat
redhatqt5-qtimageformats-0:5.9.7-2.el7_92021-06-08redhat
redhatlibwebp-0:0.3.0-10.el7_92021-06-07redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 6 ecosystems)
Debian:10(1)
PackageVulnerable rangeFix by version rangeDependents
libwebp0.6.1-2
  • every version up to 0.6.1-2+deb10u1: fixed in 0.6.1-2+deb10u1
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
libwebp—
  • every version up to 0.6.1-2.1: fixed in 0.6.1-2.1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
libwebp—
  • every version up to 0.6.1-2.1: fixed in 0.6.1-2.1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libwebp—
  • every version up to 0.6.1-2.1: fixed in 0.6.1-2.1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libwebp—
  • every version up to 0.6.1-2.1: fixed in 0.6.1-2.1
—
Debian:9(1)
PackageVulnerable rangeFix by version rangeDependents
libwebp0.5.2-1
  • every version up to 0.5.2-1+deb9u1: fixed in 0.5.2-1+deb9u1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(7)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 6× in last 7d / 26× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 157 total refreshes for this CVE.

  1. 2026-10-05 17:39 UTCEPSS rescore
  2. 2026-10-04 23:18 UTCEPSS rescore
  3. 2026-10-03 14:22 UTCEPSS rescore
  4. 2026-09-30 15:19 UTCEG score recompute
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  10. 2026-09-26 01:42 UTCOSV refresh
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  24. 2026-09-07 15:57 UTCEPSS rescore
  25. 2026-09-06 16:31 UTCOSV refresh
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  1. 2026-09-06 13:44 UTCEPSS rescore
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  9. 2026-08-27 14:21 UTCEPSS rescore
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  14. 2026-08-20 02:15 UTCOSV refresh
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  24. 2026-08-08 16:33 UTCEPSS rescore
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  26. 2026-08-06 13:43 UTCEPSS rescore
  27. 2026-08-04 21:27 UTCOSV refresh
  28. 2026-08-04 15:06 UTCEPSS rescore
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  40. 2026-07-23 01:53 UTCEG score recompute
  41. 2026-07-22 22:39 UTCEG score recompute
  42. 2026-07-22 14:05 UTCEPSS rescore
  43. 2026-07-21 15:22 UTCEPSS rescore
  44. 2026-07-21 15:22 UTCEPSS rescore
  45. 2026-07-20 17:04 UTCEPSS rescore
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  49. 2026-07-19 02:26 UTCEPSS rescore
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  51. 2026-07-18 19:59 UTCOSV refresh
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  55. 2026-07-15 01:57 UTCEPSS rescore
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  70. 2026-07-01 02:48 UTCOSV refresh
  71. 2026-06-30 23:20 UTCEPSS rescore
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  73. 2026-06-29 14:04 UTCEPSS rescore
  74. 2026-06-28 04:54 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2020-36329?
CVE-2020-36329 is a critical vulnerability published on May 21, 2021. A flaw was found in libwebp in versions before 1.0.1. A use-after-free was found due to a thread being killed too early. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
When was CVE-2020-36329 disclosed?
CVE-2020-36329 was first published on May 21, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-36329 actively exploited?
CVE-2020-36329 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.3% probability of exploitation in the next 30 days (82nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2020-36329?
CVE-2020-36329 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2020-36329?
A fix for CVE-2020-36329 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2020-36329 are linked in the Vendor Advisories panel on this page.

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