CVE-2021-3762

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 4.8% (91st percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, 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: 4.8%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A directory traversal vulnerability was found in the ClairCore engine of Clair. An attacker can exploit this by supplying a crafted container image which, when scanned by Clair, allows for arbitrary file write on the filesystem, potentially allowing for remote code execution.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
51
EG Risk 51/100CISA 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%
Exploitation5% × 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
4.8%
EPSS %ILE
91st
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

March 3, 2022

Last Modified

November 21, 2024

Advisory Details (6)

Auto-updated Oct 3, 2026
Patch available. Sources: redhat, github_pr, github_commit.
github_commit Patch Available

commit 691f2023a172 (quay/claircore)

Patch available: quay/claircore v1.5.27 (contains commit 691f2023a172)

https://github.com/quay/claircore/commit/691f2023a1720a0579e688b69a2f4bfe1f4b7821
github_pr

chore: bump claircore version

Fix merged in quay/clair PR #1380 on 2021-09-28 — awaiting tagged release

https://github.com/quay/clair/pull/1380
github_pr

chore: bump claircore version

Fix merged in quay/clair PR #1379 on 2021-09-28 — awaiting tagged release

https://github.com/quay/clair/pull/1379
redhatMentions a patch (unverified)

2000795 – (CVE-2021-3762) CVE-2021-3762 quay/claircore: directory traversal when scanning crafted container image layer allows for arbitrary file write

https://bugzilla.redhat.com/show_bug.cgi?id=2000795
generic

Re: backdoor in upstream xz/liblzma leading to ssh… - Exploit

https://vulmon.com/exploitdetails?qidtp=maillist_oss_security&qid=d19fce9ede06e13dfb5630ece7f14f83
github_pr Patch Available

rpm: prevent directory traversal when extracting

Patch available: quay/claircore v1.5.27 (PR #478 merged 2021-09-28)

https://github.com/quay/claircore/pull/478

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatquay/clair-rhel8:v3.5.7-82021-09-28redhat

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

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/quay/claircore—
  • every version up to 0.4.8: fixed in 0.4.8
  • 1.0.0 up to 1.1.0: fixed in 1.1.0
  • 0.5.0 up to 0.5.5: fixed in 0.5.5
  • every version up to 1.1.0: fixed in 1.1.0
—

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 7× in last 7d / 32× 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 185 total refreshes for this CVE.

  1. 2026-10-10 19:56 UTCEPSS rescore
  2. 2026-10-09 20:28 UTCOSV refresh
  3. 2026-10-09 20:04 UTCEPSS rescore
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  11. 2026-09-30 15:39 UTCEG score recompute
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  23. 2026-09-20 04:05 UTCOSV refresh
  24. 2026-09-19 15:38 UTCEPSS rescore
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  1. 2026-09-17 19:23 UTCEPSS rescore
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  27. 2026-08-21 23:46 UTCEPSS rescore
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  36. 2026-08-15 01:27 UTCEPSS rescore
  37. 2026-08-13 21:57 UTCEPSS rescore
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  48. 2026-08-01 04:13 UTCEPSS rescore
  49. 2026-07-30 19:21 UTCOSV refresh
  50. 2026-07-30 16:25 UTCEPSS rescore
  51. 2026-07-30 01:28 UTCEPSS rescore
  52. 2026-07-28 15:33 UTCEPSS rescore
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  55. 2026-07-23 14:16 UTCEPSS rescore
  56. 2026-07-23 02:03 UTCEG score recompute
  57. 2026-07-22 22:49 UTCEG score recompute
  58. 2026-07-22 14:06 UTCEPSS rescore
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  74. 2026-07-13 06:11 UTCEPSS rescore
  75. 2026-07-13 04:37 UTCOSV refresh

Related CVEs(same product + same CWE)

Same product

1 shown

Go:github.com/quay/claircore

Frequently asked(5)

What is CVE-2021-3762?
CVE-2021-3762 is a critical vulnerability published on March 3, 2022. A directory traversal vulnerability was found in the ClairCore engine of Clair. An attacker can exploit this by supplying a crafted container image which, when scanned by Clair, allows for arbitrary file write on the filesystem, potentially allowing for remote code execution.
When was CVE-2021-3762 disclosed?
CVE-2021-3762 was first published on March 3, 2022, 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-2021-3762 actively exploited?
CVE-2021-3762 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.8% probability of exploitation in the next 30 days (91st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2021-3762?
CVE-2021-3762 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2021-3762?
A fix for CVE-2021-3762 is available: update to the fixed version the vendor names in its advisory.

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