Medium 5.3Published Oct 7, 2026

CVE-2026-104074Coturn 4.10.0 Uninitialized Stack Memory Disclosure via ERROR-CODE

Updated under an hour ago (2026-10-19 08:23 UTC)

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Exploited in the last 30 days

Coturn 4.10.0 contains an uninitialized memory disclosure vulnerability that allows remote unauthenticated attackers to leak stack memory contents by sending a TURN Allocate request without credentials. Attackers can exploit the stun_init_error_response_common_str() function in src/client/ns_turn_msg.c, which fails to zero-initialize the avalue buffer before computing its length with strlen() and copying leaked stack bytes into the ERROR-CODE reason phrase, exposing pointer fragments that weaken ASLR and enable precise version fingerprinting.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness (CWE): CWE-908
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Oct 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

coturn coturn coturn:coturn (from the name)	from 4.10.0 before 4.11.0	CNA record

References

https://github.com/coturn/coturn/releases/tag/4.11.0release-notes
https://github.com/coturn/coturn/pull/1878issue-tracking
https://github.com/coturn/coturn/commit/741b2983cc52f967dd08c438fd72a5f08f13ca27patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.