CVE-2018-11759

CRITICALNVD 7.59.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because EPSS predicts 91% probability of exploitation within the next 30 days (top 0.2% of all CVEs). NVD baseline CVSS 7.5 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Elevated
9.0EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 91%
CISA-KEV: Not listedEPSS PROB: 91%CVSS: 7.5Exploit: Elevated riskExposed: 0

A fix is available — apply it.

The Apache Web Server (httpd) specific code that normalised the requested path before matching it to the URI-worker map in Apache Tomcat JK (mod_jk) Connector 1.2.0 to 1.2.44 did not handle some edge cases correctly. If only a sub-set of the URLs supported by Tomcat were exposed via httpd, then it was possible for a specially constructed request to expose application functionality through the reverse proxy that was not intended for clients accessing the application via the reverse proxy. It was also possible in some configurations for a specially constructed request to bypass the access controls configured in httpd. While there is some overlap between this issue and CVE-2018-1323, they are not identical.

CVSS v3
7.5
EG Score
9.0(high)
EG Risk
81(Track)
EG Risk 81/100SSVC: 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
Severity90% × 45%
Exploitation91% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
91%
EPSS %ILE
100%
KEV
Not listed

Published

October 31, 2018

Last Modified

November 21, 2024

References (26)

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatjbcs-httpd24-openssl-1:1.0.2n-14.jbcs.el72019-02-18redhat
redhatpatch2019-02-18redhat

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(1)

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

All Vendor Advisories

(2)

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 5× in last 7d / 11× 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. 2026-07-24 14:14 UTCEPSS rescore
  2. 2026-07-23 14:15 UTCEPSS rescore
  3. 2026-07-23 14:15 UTCEPSS rescore
  4. 2026-07-23 01:32 UTCEG score recompute
  5. 2026-07-22 22:12 UTCEG score recompute
  6. 2026-07-21 03:11 UTCOSV refresh
  7. 2026-07-20 17:04 UTCEPSS rescore
  8. 2026-07-20 17:04 UTCEPSS rescore
  9. 2026-07-15 16:55 UTCEPSS rescore
  10. 2026-07-04 06:28 UTCEPSS rescore
  11. 2026-07-03 22:26 UTCOSV refresh
  12. 2026-06-28 04:53 UTCEPSS rescore
  13. 2026-06-28 04:53 UTCEPSS rescore
  14. 2026-06-24 14:02 UTCEPSS rescore
  15. 2026-06-24 14:02 UTCEPSS rescore
  16. 2026-06-23 21:30 UTCEPSS rescore
  17. 2026-06-15 17:45 UTCEPSS rescore
  18. 2026-06-15 10:43 UTCOSV refresh
  19. 2026-06-14 23:14 UTCEPSS rescore
  20. 2026-06-14 23:14 UTCEPSS rescore
  21. 2026-06-13 22:58 UTCEPSS rescore
  22. 2026-06-13 22:58 UTCEPSS rescore
  23. 2026-06-12 23:09 UTCEPSS rescore
  24. 2026-06-10 13:19 UTCEPSS rescore
  25. 2026-06-08 14:14 UTCEPSS rescore
Show 11 more
  1. 2026-06-08 14:14 UTCEPSS rescore
  2. 2026-06-06 13:45 UTCEPSS rescore
  3. 2026-06-06 13:45 UTCEPSS rescore
  4. 2026-06-05 22:45 UTCEPSS rescore
  5. 2026-06-05 22:44 UTCEPSS rescore
  6. 2026-05-31 22:29 UTCEPSS rescore
  7. 2026-05-31 22:28 UTCEPSS rescore
  8. 2026-05-28 01:30 UTCEG score recompute
  9. 2026-05-28 01:30 UTCVendor advisory
  10. 2026-05-28 01:30 UTCGHSA enrichment
  11. 2026-05-26 05:16 UTCOSV refresh

Publicly available exploits

(3 references)

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

  • GitHub PoCJul10l1r4/Identificador-CVE-2018-11759
    First seen Dec 8, 2018

    This exploit for CVE 2018-11759, vulnerability in apache mod_jk, module for load-balancer

    Open source ↗
  • GitHub PoCimmunIT/CVE-2018-11759
    First seen Nov 1, 2018

    Proof of concept showing how to exploit the CVE-2018-11759

    Open source ↗
  • Nucleihttp/cves/2018/CVE-2018-11759.yaml
    First seen Jan 1, 2018

    Apache Tomcat JK Connect <=1.2.44 - Manager Access

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2018-11759?
CVE-2018-11759 is a critical vulnerability published on October 31, 2018. The Apache Web Server (httpd) specific code that normalised the requested path before matching it to the URI-worker map in Apache Tomcat JK (mod_jk) Connector 1.2.0 to 1.2.44 did not handle some edge cases correctly. If only a sub-set of the URLs supported by Tomcat were exposed via httpd, then it…
When was CVE-2018-11759 disclosed?
CVE-2018-11759 was first published in the National Vulnerability Database on October 31, 2018, 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-2018-11759 actively exploited?
CVE-2018-11759 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 91% probability of exploitation in the next 30 days, which ranks it in the top 0.2% of all scored CVEs.
What is the CVSS score of CVE-2018-11759?
CVE-2018-11759 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
How do I remediate CVE-2018-11759?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-11759, 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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