CVE-2019-19012

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 10.5%, top 5% 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
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 11%CVSS: 9.8Exploit: Elevated riskExposed: 0

A fix is available — apply it.

An integer overflow in the search_in_range function in regexec.c in Oniguruma 6.x before 6.9.4_rc2 leads to an out-of-bounds read, in which the offset of this read is under the control of an attacker. (This only affects the 32-bit compiled version). Remote attackers can cause a denial-of-service or information disclosure, or possibly have unspecified other impact, via a crafted regular expression.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
65(Track*)
EG Risk 65/100SSVC: 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%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
11%
EPSS %ILE
95%
KEV
Not listed

Published

November 17, 2019

Last Modified

November 21, 2024

Advisory Details (6)

Auto-updated Sep 6, 2026
🔬 Proof of concept available. Patch available. Sources: github_release.
generic🟡 PoC Available

GitHub - tarantula-team/CVE-2019-19012: An integer overflow in the search_in_range function in regexec.c in Oniguruma 6.x before 6.9.4_rc2 leads to an out-of-bounds read · GitHub

https://github.com/tarantula-team/CVE-2019-19012
github_release Patch Available

6.9.4 Release Candidate 2

Patch available: kkos/oniguruma v6.9.4_rc2 (pre-release)

https://github.com/kkos/oniguruma/releases/tag/v6.9.4_rc2
generic

Integer overflow related to reg->dmax in search_in_range (regexec.c) · Issue #164 · kkos/oniguruma · GitHub

https://github.com/kkos/oniguruma/issues/164
generic

[SECURITY] Fedora 30 Update: oniguruma-6.9.2-4.fc30 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V3MBNW6Z4DOXSCNWGBLQ7OA3OGUJ44WL/
generic

[SECURITY] Fedora 31 Update: oniguruma-6.9.4-1.fc31 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NO267PLHGYZSWX3XTRPKYBKD4J3YOU5V/
generic Patch Available

[SECURITY] [DLA 2020-1] libonig security update

https://lists.debian.org/debian-lts-announce/2019/12/msg00002.html

Vendor Advisories for CVE-2019-19012(4)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibonig-dev (5.9.1-1ubuntu1.1+esm2) @ trusty2026-05-27ubuntu
ubuntulibonig-dev (6.7.0-1ubuntu0.1~esm2) @ bionic2026-05-27ubuntu
redhatruby:2.5-8100020250506105643.489197e62025-05-14redhat
redhatoniguruma-0:6.8.2-2.1.el8_92024-02-20redhat
redhatoniguruma-0:6.8.2-2.1.el8_82024-01-30redhat
redhatoniguruma-0:6.8.2-2.1.el8_62024-01-25redhat

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

(6 across 6 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libonig—6.9.4-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libonig—6.9.4-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libonig—6.9.4-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libonig—6.9.4-1—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
libonig5.9.5-3.2, 5.9.5-3.2+deb8u1, 5.9.5-3.2+deb8u2, 5.9.5-3.2+deb8u35.9.5-3.2+deb8u4—
Debian:9(1)
PackageVulnerable rangeFixed inDependents
libonig6.1.3-26.1.3-2+deb9u1—

Weakness Classification(2)

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

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 6× in last 7d / 23× 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 125 total refreshes for this CVE.

  1. 2026-09-08 00:10 UTCOSV refresh
  2. 2026-09-07 15:57 UTCEPSS rescore
  3. 2026-09-06 13:44 UTCEPSS rescore
  4. 2026-09-05 15:24 UTCEPSS rescore
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  1. 2026-08-06 13:43 UTCEPSS rescore
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  15. 2026-07-23 01:42 UTCEG score recompute
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  22. 2026-07-20 01:46 UTCOSV refresh
  23. 2026-07-19 14:28 UTCEPSS rescore
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  44. 2026-07-02 16:54 UTCOSV refresh
  45. 2026-07-01 15:03 UTCEPSS rescore
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  68. 2026-06-14 23:15 UTCEPSS rescore
  69. 2026-06-14 14:13 UTCOSV refresh
  70. 2026-06-13 22:58 UTCEPSS rescore
  71. 2026-06-12 23:09 UTCEPSS rescore
  72. 2026-06-11 13:58 UTCEPSS rescore
  73. 2026-06-10 22:16 UTCEPSS rescore
  74. 2026-06-10 13:19 UTCEPSS rescore
  75. 2026-06-08 14:15 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCManhNDd/CVE-2019-19012
    First seen Nov 20, 2019

    Integer overflow in Oniguruma

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2019-19012?
CVE-2019-19012 is a critical vulnerability published on November 17, 2019. An integer overflow in the searchinrange function in regexec.c in Oniguruma 6.x before 6.9.4_rc2 leads to an out-of-bounds read, in which the offset of this read is under the control of an attacker. (This only affects the 32-bit compiled version). Remote attackers can cause a denial-of-service or…
When was CVE-2019-19012 disclosed?
CVE-2019-19012 was first published in the National Vulnerability Database on November 17, 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-2019-19012 actively exploited?
CVE-2019-19012 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 11% probability of exploitation in the next 30 days, which ranks it in the top 4.5% of all scored CVEs.
What is the CVSS score of CVE-2019-19012?
CVE-2019-19012 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2019-19012?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-19012, 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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