How severe is CVE-2026-23878?

CVE-2026-23878 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-23878 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-23878?

CVE-2026-23878 affects Hotcrp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-23878?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-23878 have an EU (EUVD) identifier?

Yes. CVE-2026-23878 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3304.

When was CVE-2026-23878 published?

CVE-2026-23878 was published on 2026-01-19 and last updated on 2026-06-17.

CVE-2026-23878

CVE-2026-23878 is a medium-severity vulnerability in Hotcrp with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-201.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-3304
Weakness: CWE-201
Affected product: Hotcrp
Published: 2026-01-19
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-23878?: CVE-2026-23878 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-23878 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-23878?: CVE-2026-23878 affects Hotcrp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-23878?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-23878 have an EU (EUVD) identifier?: Yes. CVE-2026-23878 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3304.
When was CVE-2026-23878 published?: CVE-2026-23878 was published on 2026-01-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:hotcrp:hotcrp:3.1:*:*:*:*:*:*:*

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