CVE-2020-36329

CRITICALNVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

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, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this week

Also known asEUVD-2020-23866 (ENISA EUVD) · GHSA-mprg-gw36-367p (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • 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
45
EG Risk 45/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation2.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
2.3%
EPSS %ILE
83rd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
2.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 21, 2021

Last Modified

November 21, 2024

Advisory Details (7)

Auto-updated Oct 4, 2026
Patch available. Sources: redhat.
Web pageMentions a patch (unverified)

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

https://lists.debian.org/debian-lts-announce/2021/06/msg00005.html
Red HatMentions a patch (unverified)

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
Web page

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

http://seclists.org/fulldisclosure/2021/Jul/54
Web page

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

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

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

https://support.apple.com/kb/HT212601
Web pageMentions a patch (unverified)

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

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

Patch Availability(8)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuwebp (0.4.0-4ubuntu0.1~esm1) @ trusty2026-11-02ubuntu
ubuntulibwebpdemux2 (0.6.1-2ubuntu0.21.04.1) @ hirsute2026-11-02ubuntu
redhatrhmtc/openshift-velero-plugin-rhel8:v1.4.6-42021-07-21redhat
redhatlibwebp-0:1.0.0-4.el8_12021-06-09redhat
redhatlibwebp-0:1.0.0-4.el8_22021-06-09redhat
redhatlibwebp-0:1.0.0-3.el8_42021-06-09redhat
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)

Data Freshness Timeline

(refreshed 27× in last 7d / 90× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 243 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 144 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 01:21 UTCEG score recompute
  2. 2026-11-02 01:21 UTCVendor advisory
  3. 2026-11-02 01:21 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  4. 2026-11-01 00:35 UTCEG score recompute
  5. 2026-11-01 00:35 UTCVendor advisory
  6. 2026-11-01 00:35 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  7. 2026-10-31 16:28 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  8. 2026-10-30 23:50 UTCEG score recompute
  9. 2026-10-30 23:50 UTCVendor advisory
  10. 2026-10-30 23:50 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  11. 2026-10-30 16:29 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  12. 2026-10-29 23:05 UTCEG score recompute
  13. 2026-10-29 23:05 UTCVendor advisory
  14. 2026-10-29 23:05 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-10-29 16:28 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  16. 2026-10-28 22:19 UTCEG score recompute
  17. 2026-10-28 22:19 UTCVendor advisory
  18. 2026-10-28 22:19 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  19. 2026-10-28 16:28 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  20. 2026-10-27 21:34 UTCEG score recompute
  21. 2026-10-27 21:34 UTCVendor advisory
  22. 2026-10-27 21:34 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  23. 2026-10-27 16:28 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  24. 2026-10-26 20:49 UTCEG score recompute
  25. 2026-10-26 20:49 UTCVendor advisory
Show 74 more
  1. 2026-10-26 20:49 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  2. 2026-10-26 16:27 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  3. 2026-10-25 18:04 UTCEG score recompute
  4. 2026-10-25 18:04 UTCVendor advisory
  5. 2026-10-25 18:04 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-10-25 16:28 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  7. 2026-10-24 16:49 UTCEG score recompute
  8. 2026-10-24 16:49 UTCVendor advisory
  9. 2026-10-24 16:48 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  10. 2026-10-24 16:28 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  11. 2026-10-23 16:28 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  12. 2026-10-23 16:01 UTCEG score recompute
  13. 2026-10-23 16:01 UTCVendor advisory
  14. 2026-10-23 16:01 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-10-22 16:29 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  16. 2026-10-22 15:13 UTCEG score recompute
  17. 2026-10-22 15:13 UTCVendor advisory
  18. 2026-10-22 15:13 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  19. 2026-10-21 16:28 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  20. 2026-10-21 14:26 UTCEG score recompute
  21. 2026-10-21 14:26 UTCVendor advisory
  22. 2026-10-21 14:26 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  23. 2026-10-20 16:28 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  24. 2026-10-20 13:40 UTCEG score recompute
  25. 2026-10-20 13:40 UTCVendor advisory
  26. 2026-10-20 13:40 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  27. 2026-10-19 16:27 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  28. 2026-10-19 12:52 UTCEG score recompute
  29. 2026-10-19 12:52 UTCVendor advisory
  30. 2026-10-19 12:52 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  31. 2026-10-18 16:28 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  32. 2026-10-18 11:23 UTCVendor advisory
  33. 2026-10-18 11:23 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  34. 2026-10-18 09:22 UTCEG score recompute
  35. 2026-10-17 16:28 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  36. 2026-10-17 10:32 UTCEG score recompute
  37. 2026-10-17 10:32 UTCVendor advisory
  38. 2026-10-17 10:32 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  39. 2026-10-16 16:33 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  40. 2026-10-16 09:45 UTCEG score recompute
  41. 2026-10-16 09:45 UTCVendor advisory
  42. 2026-10-16 09:45 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  43. 2026-10-15 16:27 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  44. 2026-10-15 08:59 UTCEG score recompute
  45. 2026-10-15 08:59 UTCVendor advisory
  46. 2026-10-15 08:59 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  47. 2026-10-14 16:28 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  48. 2026-10-14 05:16 UTCEG score recompute
  49. 2026-10-14 05:16 UTCVendor advisory
  50. 2026-10-14 05:15 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  51. 2026-10-13 16:28 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  52. 2026-10-13 00:31 UTCVendor advisory
  53. 2026-10-13 00:31 UTCGHSA enrichmentGHSA-mprg-gw36-367p · GitHub severity CRITICAL · GitHub CVSS 9.8
  54. 2026-10-12 19:35 UTCEG score recompute
  55. 2026-10-12 16:29 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  56. 2026-10-11 23:59 UTCEG score recompute
  57. 2026-10-11 13:43 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  58. 2026-10-10 19:56 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  59. 2026-10-09 20:04 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  60. 2026-10-08 16:38 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  61. 2026-10-07 23:44 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  62. 2026-10-06 15:13 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  63. 2026-10-05 17:39 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  64. 2026-10-04 23:18 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  65. 2026-10-03 14:22 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  66. 2026-09-30 15:19 UTCEG score recompute
  67. 2026-09-30 14:59 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  68. 2026-09-29 15:14 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  69. 2026-09-27 13:41 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  70. 2026-09-26 15:54 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  71. 2026-09-26 01:42 UTCOSV refresh
  72. 2026-09-24 14:00 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  73. 2026-09-22 14:43 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  74. 2026-09-21 20:28 UTCEPSS rescoreEPSS 2.3% · 82nd percentile

Frequently asked(5)

What is CVE-2020-36329?
CVE-2020-36329 is a critical-severity vulnerability; its CVE record was 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 the CVE record for CVE-2020-36329 published?
The CVE record for CVE-2020-36329 was published on May 21, 2021. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 21, 2024; the record at its source may have been updated since.
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 (83rd 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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-36329

Explore →

Is Your Infrastructure Affected by CVE-2020-36329?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.