What is CVE-2026-23878?

CVE-2026-23878 is a medium-severity vulnerability in Hotcrp, classified under Insertion of Sensitive Information into Sent Data. CVSS score: 6.5/10. Published 2026-01-19.

How severe is CVE-2026-23878?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Hotcrp

CVE-2026-23878

HotCRP is conference review software. Starting in commit aa20ef288828b04550950cf67c831af8a525f508 and prior to commit ceacd5f1476458792c44c6a993670f02c984b4a0, authors with at least one submission on a HotCRP site could use the document API to download any documents (PDFs, attachments) associated with any submission. The problem was patched in commit ceacd5f1476458792c44c6a993670f02c984b4a0.

EPSS: 0.003 (17.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Hotcrp — versions 3.1
Kohler Hotcrp — versions >= aa20ef288828b04550950cf67c831af8a525f508, < ceacd5f1476458792c44c6a993670f02c984b4a0

Weakness classification (CWE)

CWE-201 — Insertion of Sensitive Information into Sent Data

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-23878?: CVE-2026-23878 is a medium-severity vulnerability in Hotcrp, classified under Insertion of Sensitive Information into Sent Data. CVSS score: 6.5/10. Published 2026-01-19.
How severe is CVE-2026-23878?: Medium severity. CVSS v3 base score is 6.5 out of 10.