7.1

CVE-2026-73215: coturn Uncontrolled Resource Consumption

CVSS: 7.1v4.0HighDeferred
AliasesUBUNTU-CVE-2026-73215DEBIAN-CVE-2026-73215
Published 11-08-2026Last modified 13-08-2026
Open JSON

Vulnerability summary

CVE-2026-73215 is a high (CVSS 7.1) Uncontrolled Resource Consumption vulnerability in coturn. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 38.1% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v4.0 (CVE.org)
EPSS score
0.45%
0%100%
Low · +0.12 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:11617-1

Timeline

  1. 11-08-2026
    PublishedVulnerability first disclosed.
  2. 13-08-2026
    Last modifiedVulnerability information updated.

Description

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.17.0, turnports_allocate_even() in src/apps/relay/turn_ports.c marks the unused odd sibling port as TPS_TAKEN_ODD for an EVEN-PORT Allocate request with reservation bit R=0 even though no RTCP socket will release it, allowing an authenticated client to permanently exhaust the relay port pool and cause subsequent allocations to fail with STUN error 508. This issue is fixed in version 4.17.0.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.45%

Chance of exploitation in the next 30 days

Percentile

38%

Versus all other CVEs

30-day change

+0.12 pp

From 0.33% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.45%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Coturn1 product
Debian1 product
  • coturnAll versions (No fix recorded) | < 4.18.0-1
Ubuntu1 product
  • coturnAll versions (No fix recorded)

3 vendors · 3 products

References

6 links