CVE-2020-9308

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 2.3%, top 19% of all CVEs by exploit prediction. 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
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 8.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

archive_read_support_format_rar5.c in libarchive before 3.4.2 attempts to unpack a RAR5 file with an invalid or corrupted header (such as a header size of zero), leading to a SIGSEGV or possibly unspecified other impact.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: Track

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
Severity88% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
82%
KEV
Not listed

Published

February 20, 2020

Last Modified

November 21, 2024

References (14)

Affected Packages

(18 across 18 ecosystems)
Alpine:v3.11(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.4.2-r0—
Alpine:v3.12(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.4.2-r0—
Alpine:v3.13(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.4.2-r0—
Alpine:v3.14(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.4.2-r0—
Alpine:v3.15(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.4.2-r0—
Alpine:v3.16(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.4.2-r0—
Alpine:v3.17(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.4.2-r0—
Alpine:v3.18(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.4.2-r0—
Alpine:v3.19(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.4.2-r0—
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.4.2-r0—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.4.2-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.4.2-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.4.2-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.4.2-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.4.0-2—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.4.0-2—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.4.0-2—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libarchive—3.4.0-2—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 29× 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 128 total refreshes for this CVE.

  1. 2026-08-21 23:45 UTCEPSS rescore
  2. 2026-08-21 03:53 UTCOSV refresh
  3. 2026-08-19 17:00 UTCEPSS rescore
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  17. 2026-08-05 19:10 UTCOSV refresh
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  1. 2026-07-25 14:15 UTCEPSS rescore
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  3. 2026-07-23 14:15 UTCEPSS rescore
  4. 2026-07-23 01:55 UTCEG score recompute
  5. 2026-07-22 22:41 UTCEG score recompute
  6. 2026-07-22 14:05 UTCEPSS rescore
  7. 2026-07-21 15:22 UTCEPSS rescore
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  9. 2026-07-20 17:04 UTCEPSS rescore
  10. 2026-07-20 17:04 UTCEPSS rescore
  11. 2026-07-19 18:18 UTCOSV refresh
  12. 2026-07-19 14:28 UTCEPSS rescore
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  20. 2026-07-15 01:57 UTCEPSS rescore
  21. 2026-07-13 22:27 UTCEPSS rescore
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  23. 2026-07-12 05:44 UTCEPSS rescore
  24. 2026-07-12 05:44 UTCEPSS rescore
  25. 2026-07-11 08:25 UTCEPSS rescore
  26. 2026-07-11 08:25 UTCEPSS rescore
  27. 2026-07-09 19:07 UTCEPSS rescore
  28. 2026-07-08 15:12 UTCEPSS rescore
  29. 2026-07-07 13:43 UTCEPSS rescore
  30. 2026-07-06 16:25 UTCEPSS rescore
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  37. 2026-07-02 16:57 UTCEPSS rescore
  38. 2026-07-02 08:17 UTCOSV refresh
  39. 2026-07-01 15:03 UTCEPSS rescore
  40. 2026-06-30 23:20 UTCEPSS rescore
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  42. 2026-06-28 14:05 UTCEPSS rescore
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  45. 2026-06-27 03:06 UTCEPSS rescore
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  51. 2026-06-23 21:31 UTCEPSS rescore
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  54. 2026-06-21 14:54 UTCEPSS rescore
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  58. 2026-06-18 17:51 UTCEPSS rescore
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  62. 2026-06-15 17:46 UTCEPSS rescore
  63. 2026-06-14 23:15 UTCEPSS rescore
  64. 2026-06-14 08:13 UTCOSV refresh
  65. 2026-06-13 22:58 UTCEPSS rescore
  66. 2026-06-13 22:58 UTCEPSS rescore
  67. 2026-06-12 23:10 UTCEPSS rescore
  68. 2026-06-12 23:10 UTCEPSS rescore
  69. 2026-06-11 13:58 UTCEPSS rescore
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  71. 2026-06-10 22:16 UTCEPSS rescore
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  73. 2026-06-08 14:15 UTCEPSS rescore
  74. 2026-06-07 15:23 UTCEPSS rescore
  75. 2026-06-07 15:23 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2020-9308?
CVE-2020-9308 is a high vulnerability published on February 20, 2020. archivereadsupportformatrar5.c in libarchive before 3.4.2 attempts to unpack a RAR5 file with an invalid or corrupted header (such as a header size of zero), leading to a SIGSEGV or possibly unspecified other impact.
When was CVE-2020-9308 disclosed?
CVE-2020-9308 was first published in the National Vulnerability Database on February 20, 2020, 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-2020-9308 actively exploited?
CVE-2020-9308 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 18.5% of all scored CVEs.
What is the CVSS score of CVE-2020-9308?
CVE-2020-9308 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2020-9308?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-9308, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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