CVE-2026-45078

MEDIUM

CVSS v3.1: 5.5 · EPSS: 0.0001 (2.8 percentile)

No user interactionResource ExhaustionVendor advisory ref

Source data as of:

At a glance

Severity
MEDIUM
CVSS
5.5 v3.1 · NVD
EPSS
0.0001 (2.8 percentile) · FIRST.org
CISA KEV
No
Type
Resource Exhaustion · NVD CWE
Attack conditions (CVSS vector)
No user interaction · Source: NVD Vector
Affected vendors
element
Published
2026-05-28 · Modified: 2026-06-03
References
Jump to references (1)

CVSS / EPSS / KEV

CVSS v3.1 5.5 / 10 MEDIUM Source: NVD
CVSS v4.0 6.8 / 10 MEDIUM Source: NVD
EPSS 0.0001 2.8 percentile Source: FIRST.org
CISA KEV No Source: CISA

Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources

Description

Synapse is an open source Matrix homeserver implementation. Prior to 1.152.1, local authenticated users can cause Synapse to starve other requests of CPU and lead to other requests failing, causing other users to be denied service. This vulnerability is fixed in 1.152.1.

Record details

CVE ID
CVE-2026-45078
CVSS (v3.1)
5.5 (MEDIUM)
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Exploitability subscore
1.8
Impact subscore
3.6
EPSS
0.0001 (2.8 percentile) — 2026-06-03
CISA KEV
No
Weakness (CWE)
CWE-770
Affected vendors
element
Affected configurations (CPE)
1
Published
2026-05-28
Modified
2026-06-03
Status
Analyzed

References

Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.

Related records

Other records sharing a factual facet, for cross-reference. A descriptive neighbourhood — ordering does not imply priority and is not a recommendation.

Same weakness type (CWE)

CVE-2026-28299 HIGH CVSS 8.2 CVE-2026-48597 HIGH CVSS 8.2 CVE-2026-48862 HIGH CVSS 8.2 CVE-2026-49754 HIGH CVSS 8.2

Published the same year

CVE-2026-0072 CRITICAL CVSS 10.0 CVE-2026-40965 CRITICAL CVSS 10.0 CVE-2026-7312 CRITICAL CVSS 10.0 CVE-2026-40089 CRITICAL CVSS 9.9
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