CVE-2019-3822

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-13. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 13%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

libcurl versions from 7.36.0 to before 7.64.0 are vulnerable to a stack-based buffer overflow. The function creating an outgoing NTLM type-3 header (lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_message()), generates the request HTTP header contents based on previously received data. The check that exists to prevent the local buffer from getting overflowed is implemented wrongly (using unsigned math) and as such it does not prevent the overflow from happening. This output data can grow larger than the local buffer if very large 'nt response' data is extracted from a previous NTLMv2 header provided by the malicious or broken HTTP server. Such a 'large value' needs to be around 1000 bytes or more. The actual payload data copied to the target buffer comes from the NTLMv2 type-2 response header.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
95.9%
KEV
Not listed

Published

February 6, 2019

Last Modified

November 21, 2024

Advisory Details (9)

Auto-updated Jul 8, 2026
Patch available. Sources: redhat.
generic

myF5

https://support.f5.com/csp/article/K84141449
generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20190719-0004/
generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20190315-0001/
generic

cURL: Multiple vulnerabilities (GLSA 201903-03) — Gentoo security

https://security.gentoo.org/glsa/201903-03
generic
https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E
generic

curl - NTLMv2 type-3 header stack buffer overflow - CVE-2019-3822

https://curl.haxx.se/docs/CVE-2019-3822.html
redhat Patch Available

1670254 – (CVE-2019-3822) CVE-2019-3822 curl: NTLMv2 type-3 header stack buffer overflow

Affected: Red Hat Enterprise Linux 5, 6, and 7 do not support NTLMv2 type-3 headers, hence they are not affected by this flaw.

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3822
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2019:3701
generic
http://www.securityfocus.com/bid/106950

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibcurl4-openssl-dev (7.47.0-1ubuntu2.12) @ xenial2026-05-27ubuntu
redhatcurl-0:7.61.1-11.el82019-11-05redhat
redhatpatch2019-06-18redhat

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.

Weakness Classification(2)

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

All Vendor Advisories

(3)

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 14× in last 7d / 41× 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 01:45 UTCEG score recompute
  2. 2026-07-22 22:25 UTCEG score recompute
  3. 2026-07-22 14:05 UTCEPSS rescore
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  6. 2026-07-20 23:02 UTCOSV refresh
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  1. 2026-07-06 16:25 UTCEPSS rescore
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  3. 2026-07-03 18:26 UTCOSV refresh
  4. 2026-07-01 15:03 UTCEPSS rescore
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  28. 2026-06-15 06:43 UTCOSV refresh
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  57. 2026-05-27 22:41 UTCEG score recompute
  58. 2026-05-27 22:41 UTCVendor advisory
  59. 2026-05-27 22:41 UTCGHSA enrichment
  60. 2026-05-27 13:39 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2019-3822?
CVE-2019-3822 is a critical vulnerability published on February 6, 2019. libcurl versions from 7.36.0 to before 7.64.0 are vulnerable to a stack-based buffer overflow. The function creating an outgoing NTLM type-3 header (lib/vauth/ntlm.c:Curlauthcreatentlmtype3_message()), generates the request HTTP header contents based on previously received data. The check that…
When was CVE-2019-3822 disclosed?
CVE-2019-3822 was first published in the National Vulnerability Database on February 6, 2019, 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-2019-3822 actively exploited?
CVE-2019-3822 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 95.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2019-3822?
CVE-2019-3822 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2019-3822?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-3822, 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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