CVE-2019-18183

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 3.7%, top 12% 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
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 4%CVSS: 9.8Exploit: NoneExposed: 0

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

pacman before 5.2 is vulnerable to arbitrary command injection in lib/libalpm/sync.c in the apply_deltas() function. This can be exploited when unsigned databases are used. To exploit the vulnerability, the user must enable the non-default delta feature and retrieve an attacker-controlled crafted database and delta file.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: 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
Severity98% × 45%
Exploitation4% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
88.5%
KEV
Not listed

Published

February 24, 2020

Last Modified

November 21, 2024

Advisory Details (6)

Auto-updated Jun 13, 2026
No patch confirmed yet.
generic

[SECURITY] Fedora 31 Update: pacman-5.2.1-2.fc31 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2TTUXXUW5OCOASIRMJK4RHEPLEA33Y6C/
generic

alpine-secdb/v3.11/community.yaml at master · alpinelinux/alpine-secdb · GitHub

https://github.com/alpinelinux/alpine-secdb/blob/master/v3.11/community.yaml
generic

Explore groups · GitLab

https://git.archlinux.org/pacman.git/tree/lib/libalpm/sync.c?h=v5.1.3#n767
generic

Explore groups · GitLab

https://git.archlinux.org/pacman.git/commit/?id=c0e9be7973be6c81b22fde91516fb8991e7bb07b
generic

[SECURITY] Fedora 32 Update: pacman-5.2.1-2.fc32 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KIDJ4XKBZRRVRFFGKUA3ZU6NFIP5JUG3/
generic

[SECURITY] Fedora 30 Update: pacman-5.2.1-2.fc30 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K53C45EDWBU3UCN3IRIGR5EZUNWXS7BW/

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 44× 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.

  1. 2026-07-23 14:15 UTCEPSS rescore
  2. 2026-07-23 01:42 UTCEG score recompute
  3. 2026-07-22 22:22 UTCEG score recompute
  4. 2026-07-22 14:05 UTCEPSS rescore
  5. 2026-07-21 15:22 UTCEPSS rescore
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  25. 2026-07-09 19:06 UTCEPSS rescore
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  1. 2026-07-08 15:11 UTCEPSS rescore
  2. 2026-07-07 13:43 UTCEPSS rescore
  3. 2026-07-06 16:25 UTCEPSS rescore
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  5. 2026-07-06 02:20 UTCEPSS rescore
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  7. 2026-07-04 06:28 UTCEPSS rescore
  8. 2026-07-01 15:03 UTCEPSS rescore
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  10. 2026-06-30 23:20 UTCEPSS rescore
  11. 2026-06-29 14:03 UTCEPSS rescore
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  15. 2026-06-27 03:06 UTCEPSS rescore
  16. 2026-06-25 13:47 UTCEPSS rescore
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  18. 2026-06-24 14:03 UTCEPSS rescore
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  20. 2026-06-23 21:31 UTCEPSS rescore
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  22. 2026-06-21 14:54 UTCEPSS rescore
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  26. 2026-06-19 19:23 UTCEPSS rescore
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  28. 2026-06-18 17:50 UTCEPSS rescore
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  31. 2026-06-15 17:45 UTCEPSS rescore
  32. 2026-06-13 22:58 UTCEPSS rescore
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  37. 2026-06-08 14:15 UTCEPSS rescore
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  40. 2026-06-06 13:45 UTCEPSS rescore
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  42. 2026-06-05 22:45 UTCEPSS rescore
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  44. 2026-06-05 06:08 UTCEPSS rescore
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  46. 2026-06-04 13:10 UTCEPSS rescore
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  48. 2026-06-02 20:11 UTCEPSS rescore
  49. 2026-06-02 20:11 UTCEPSS rescore
  50. 2026-06-01 13:50 UTCEPSS rescore
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  52. 2026-05-31 22:29 UTCEPSS rescore
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  54. 2026-05-31 00:14 UTCEPSS rescore
  55. 2026-05-31 00:14 UTCEPSS rescore
  56. 2026-05-29 13:42 UTCEPSS rescore
  57. 2026-05-28 13:43 UTCEPSS rescore
  58. 2026-05-27 13:38 UTCEPSS rescore
  59. 2026-05-27 07:20 UTCEG score recompute
  60. 2026-05-27 07:20 UTCGHSA enrichment
  61. 2026-05-26 13:42 UTCEPSS rescore
  62. 2026-05-26 13:42 UTCEPSS rescore
  63. 2026-05-26 07:17 UTCEPSS rescore
  64. 2026-05-26 07:17 UTCEPSS rescore
  65. 2026-05-26 07:17 UTCEPSS rescore
  66. 2026-05-25 05:37 UTCOSV refresh

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Frequently asked(5)

What is CVE-2019-18183?
CVE-2019-18183 is a critical vulnerability published on February 24, 2020. pacman before 5.2 is vulnerable to arbitrary command injection in lib/libalpm/sync.c in the apply_deltas() function. This can be exploited when unsigned databases are used. To exploit the vulnerability, the user must enable the non-default delta feature and retrieve an attacker-controlled crafted…
When was CVE-2019-18183 disclosed?
CVE-2019-18183 was first published in the National Vulnerability Database on February 24, 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-2019-18183 actively exploited?
CVE-2019-18183 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 88.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2019-18183?
CVE-2019-18183 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2019-18183?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-18183, 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.

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