High CVSS 8.2

CVE-2026-15928

XMLRPC-C Library versions 1.07 through 1.67.01 are vulnerable to a reflected cross-site scripting (XSS) vulnerability in the error page component.

What this means

Exposure: Exploitable remotely over the network and without authentication — but only if a user opens booby-trapped content.
Impact: An attacker can read sensitive data. The impact spreads beyond the vulnerable component into other parts of the system.
Weakness: Attacker-supplied script runs in other users’ browsers (cross-site scripting).
Likelihood: Its EPSS score stays low: nothing points to imminent exploitation, which is no reason to leave it unpatched.

What to doFold into the next patch cycle.

Read automatically from the CVSS vector, the weakness type (CWE) and the EPSS score. The technical description above remains the one published by NIST.

Published: 27 July 2026
CVSS: 8.2 (v4.0) CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS: 0.27% probability of exploitation within 30 days · above 19% of all CVEs
Weakness: CWE-79
Sources: nvd

References

https://nvd.nist.gov/vuln/detail/CVE-2026-15928