Apache Tomcat

CVE-2017-12617: Apache Tomcat Remote Code Execution Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 25 Mar 2022, 1,634 days after the CVE record was published.

How likely is exploitation in the next 30 days?

100%

EPSS score, percentile 100 of all scored records

How severe?

8.1 High

CVSS v3.1 base score, from CISA's enrichment of the record

What should I do?

CISA deadline 15 Apr 2022. Apply updates per vendor instructions.

Advisories and patches (12)

Which versions are affected?

Affected

9.0.0.M1 to 9.0.0
8.5.0 to 8.5.22
8.0.0.RC1 to 8.0.46
7.0.0 to 7.0.81

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

Required action, set by CISA

Apply updates per vendor instructions.

CISA due date for this action: 15 April 2022.

Advisories and patches

RHSA-2017:3113 (Vendor advisory)
RHSA-2017:3080 (Vendor advisory)
RHSA-2018:0269 (Vendor advisory)
RHSA-2018:0270 (Vendor advisory)
RHSA-2018:0271 (Vendor advisory)
RHSA-2018:2939 (Vendor advisory)
RHSA-2018:0465 (Vendor advisory)
USN-3665-1 (Vendor advisory)
RHSA-2018:0268 (Vendor advisory)
RHSA-2017:3114 (Vendor advisory)
RHSA-2018:0275 (Vendor advisory)
RHSA-2018:0466 (Vendor advisory)

Linked from CISA's catalog entry

https://nvd.nist.gov/vuln/detail/CVE-2017-12617

Affected products and versions

As listed in the CVE record.

Apache Software Foundation Apache Tomcat
Status	Versions
Affected	9.0.0.M1 to 9.0.0
Affected	8.5.0 to 8.5.22
Affected	8.0.0.RC1 to 8.0.46
Affected	7.0.0 to 7.0.81

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

When running Apache Tomcat, it is possible to upload a JSP file to the server via a specially crafted request. This JSP could then be requested and any code it contained would be executed by the server.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

CISA added CVE-2017-12617 to its Known Exploited Vulnerabilities (KEV) catalog on 25 Mar 2022.
CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
The due date CISA sets for the required action is 15 Apr 2022.
The CVE record was published on 3 Oct 2017, 1,634 days before it was added to KEV.
The CVE record carries a CVSS v3.1 base score of 8.1 (High), taken from CISA's enrichment of the record.
FIRST's EPSS model puts the probability of exploitation in the next 30 days at 100% (percentile 100), as of 28 Oct 2026.
CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

When running Apache Tomcat versions 9.0.0.M1 to 9.0.0, 8.5.0 to 8.5.22, 8.0.0.RC1 to 8.0.46 and 7.0.0 to 7.0.81 with HTTP PUTs enabled (e.g. via setting the readonly initialisation parameter of the Default servlet to false) it was possible to upload a JSP file to the server via a specially crafted request. This JSP could then be requested and any code it contained would be executed by the server.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

CWE-434: Unrestricted Upload of File with Dangerous Type

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

Date	Event
3 Oct 2017	CVE record published
25 Mar 2022	Added to CISA KEV
15 Apr 2022	CISA due date for the required action
21 Oct 2025	CVE record last updated

References

32 more in the CVE record.

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