CVE-2019-19726

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 4%CVSS: 7.8Exploit: NoneExposed: 0

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

OpenBSD through 6.6 allows local users to escalate to root because a check for LD_LIBRARY_PATH in setuid programs can be defeated by setting a very small RLIMIT_DATA resource limit. When executing chpass or passwd (which are setuid root), _dl_setup_env in ld.so tries to strip LD_LIBRARY_PATH from the environment, but fails when it cannot allocate memory. Thus, the attacker is able to execute their own library code as root.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
66(Track)
EG Risk 66/100SSVC: 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
Severity78% × 45%
Exploitation65% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
88.0%
KEV
Not listed

Published

December 12, 2019

Last Modified

November 21, 2024

References (18)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 45× 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 01:43 UTCEG score recompute
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  60. 2026-05-27 10:39 UTCGHSA enrichment
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Publicly available exploits

(3 references)

Working exploit code is in the public domain (1 Metasploit module) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-47803✓ verified
    First seen Dec 30, 2019

    OpenBSD - Dynamic Loader chpass Privilege Escalation (Metasploit)

    Open source ↗
  • Exploit-DBEDB-47780✓ verified
    First seen Dec 16, 2019

    OpenBSD 6.x - Dynamic Loader Privilege Escalation

    Open source ↗
  • Metasploitexploit/openbsd/local/dynamic_loader_chpass_privesc✓ verified
    First seen Dec 11, 2019

    OpenBSD Dynamic Loader chpass Privilege Escalation

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2019-19726?
CVE-2019-19726 is a high vulnerability published on December 12, 2019. OpenBSD through 6.6 allows local users to escalate to root because a check for LDLIBRARYPATH in setuid programs can be defeated by setting a very small RLIMITDATA resource limit. When executing chpass or passwd (which are setuid root), dlsetupenv in ld.so tries to strip LDLIBRARYPATH from the…
When was CVE-2019-19726 disclosed?
CVE-2019-19726 was first published in the National Vulnerability Database on December 12, 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-2019-19726 actively exploited?
CVE-2019-19726 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 88.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2019-19726?
CVE-2019-19726 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2019-19726?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-19726, 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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