7.5

CVE-2026-17615: Resteasy-core: resteasy sourceprovider remote unauthenticated file read

Awaiting analysis
AliasesRHSA-2026:72424RHSA-2026:77297UBUNTU-CVE-2026-17615
Published 31-08-2026Last modified 28-10-2026

Vulnerability summary

CVE-2026-17615 is a high (CVSS 7.5) vulnerability in resteasy3.0. EPSS estimates a 0.82% chance of exploitation in the next 30 days, higher than 57.2% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.82%
0%100%
Low · +0.46 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 31-08-2026
    PublishedVulnerability first disclosed.
  2. 28-10-2026
    Last modifiedVulnerability information updated.

Description

A flaw was found in RESTEasy's SourceProvider. This vulnerability allows an unauthenticated attacker to perform an unauthenticated remote file read. By sending a specially crafted XML body with a DOCTYPE declaration referencing external entities to an endpoint that accepts application/xml and returns Source or StreamSource, the server can be tricked into resolving the entity and including sensitive file contents in the HTTP response. This is due to the SourceProvider.writeTo() method creating a SAXParser without disabling external entity resolution, leading to an XML External Entity (XXE) vulnerability.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.82%

Chance of exploitation in the next 30 days

Percentile

57%

Versus all other CVEs

30-day change

Increase +0.46 pp

From 0.36% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Redhat5 products
  • pki-resteasy-client< 0:3.0.26-20.el9_8 | < 0:3.0.26-20.el9_6 | < 0:3.0.26-20.el9_4
  • pki-resteasy-core< 0:3.0.26-20.el9_8 | < 0:3.0.26-20.el9_6 | < 0:3.0.26-20.el9_4
  • pki-resteasy-jackson2-provider< 0:3.0.26-20.el9_8 | < 0:3.0.26-20.el9_6 | < 0:3.0.26-20.el9_4
  • pki-resteasy-servlet-initializer< 0:3.0.26-20.el9_8 | < 0:3.0.26-20.el9_6 | < 0:3.0.26-20.el9_4
  • resteasy< 0:3.0.26-20.el9_8 | < 0:3.0.26-20.el9_6 | < 0:3.0.26-20.el9_4
Ubuntu2 products
  • resteasyAll versions (No fix recorded)
  • resteasy3.0All versions (No fix recorded)
Debian1 product
  • resteasy3.0All versions (No fix recorded)

3 vendors · 8 products

References

19 links
Show all 19 references