Public proof of conceptFix available

CVE-2018-11761

Q: Is CVE-2018-11761 actively exploited?

Active exploitation of CVE-2018-11761 has not been confirmed. Its EPSS score was 9.4% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2018-11761?

CVE-2018-11761 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

A public proof of concept exists; no exploitation attested.

Published2018-09-19
WeaknessCWE-611

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

In Apache Tika 0.1 to 1.18, the XML parsers were not configured to limit entity expansion. They were therefore vulnerable to an entity expansion vulnerability which can lead to a denial of service attack.

Timeline

dates in UTC

2018-09-1914:29CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-11761?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-11761?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Oracle business process management suite

Branch	Affected	Fixed in	Source
12.1	= 12.1.3.0.0	no fix published	NVD
12.2	= 12.2.1.3.0	no fix published	NVD

Apache tika

Branch	Affected	Fixed in	Source
1.18	≥ 0.1, ≤ 1.18	no fix published	NVD

tika-core

Branch	Affected	Fixed in	Source
1.19	≥ 0.1, < 1.19.1	1.19.1	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

www.oracle.comPatch

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 1 repository, unverifiedbrianwrf/CVE-2018-11761

Sources

NVDCVSS 3.07.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
NVDweakness (CWE)CWE-611read 2026-10-23
FIRST EPSSEPSS score9.4 %2026-10-23
PoC-in-GitHubproof of concept1read 2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2018-09-19
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2018-11761?

Is CVE-2018-11761 actively exploited?

Active exploitation of CVE-2018-11761 has not been confirmed. Its EPSS score was 9.4% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-11761?

CVE-2018-11761 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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