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CVE-2017-5651

37
FAUCET Score

CVE-2017-5651 is a critical vulnerability affecting Apache Tomcat versions 9.0.0.M1 to 9.0.0.M18 and 8.5.0 to 8.5.12, stemming from a regression in HTTP connector send file processing. This flaw allows a Processor to be cached twice, potentially leading to its reuse for multiple requests, resulting in unexpected errors or response mix-ups. With a CVSS score of 9.8 (CRITICAL), it presents a high-impact risk with no authentication or user interaction required for exploitation. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
8.5.0CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:8.5.0:*:*:*:*:*:*:*
8.5.1CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:8.5.1:*:*:*:*:*:*:*
8.5.2CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:8.5.2:*:*:*:*:*:*:*
8.5.3CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:8.5.3:*:*:*:*:*:*:*
8.5.4CPE matchmatch criteria
cpe:2.3:a:apache:tomcat:8.5.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
7.75%
Probability of exploitation in next 30 days
EPSS Percentile
94.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0775 is in the 89th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

mavenpatch availablevia ghsa
Product: org.apache.tomcat:tomcat-coyoteFixed in: 9.0.0.M19
mavenpatch availablevia ghsa
Product: org.apache.tomcat:tomcat-coyoteFixed in: 8.5.13
mavenpatch availablevia ghsa
Product: org.apache.tomcat.embed:tomcat-embed-coreFixed in: 9.0.0.M19
mavenpatch availablevia ghsa
Product: org.apache.tomcat.embed:tomcat-embed-coreFixed in: 8.5.13

Vendor Advisories (2)

mavenGHSA-9hg2-395j-83rmcritical

Expected Behavior Violation in Apache Tomcat

May 13, 2022
redhatCVE-2017-5651Important

tomcat: Incorrect handling of send file processing could result into adding Processort to the cache twice

Apr 10, 2017

References

bz.apache.org / bugzilla/show_bug.cgi
Issue TrackingPatch
lists.apache.org / thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f8d0551%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/5c0e00fd31efc11e147bf99d0f03c00a734447d3b131ab0818644cdb%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/6694538826b87522fb723d2dcedd537e14ebe0a381d92e5525a531d8%40%3Cannounce.tomcat.apache.org%3E
lists.apache.org / thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7cb61b3%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f83bbedc%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/eb6efa8d59c45a7a9eff94c4b925467d3b3fec8ba7697f3daa314b04%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d%40%3Cdev.tomcat.apache.org%3E
lists.apache.org / thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0%40%3Cdev.tomcat.apache.org%3E
security.gentoo.org / glsa/201705-09
security.netapp.com / advisory/ntap-20180614-0001
oracle.com / technetwork/security-advisory/cpujul2017-3236622.html
securityfocus.com / bid/97544
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038219