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.
CVE-2026-104074
MEDIUMPre-NVD 5.35.3—Trending — 4 sources updated this week
EchelonGraph scoreHIGH confidence
Score 5.3 from GitHub Security Advisory published 2026-10-07. A secondary CVSS source baseline 5.3; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
5.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.3Exploit: None knownExposed services: Not assessed
A fix is available — apply it.
- CVSS v3
- 5.3
- EG Score
- 5.3MEDIUMhigh confidence
- EG Risk
- 24EG Risk 24/100
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computed (value × EchelonGraph’s weight)Severity53% × 45%The EG Score, 5.3 of 10.Exploitation0.3% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact partial (CVSS v4.0 confidentiality and integrity impact neither High). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 0.3%
- EPSS %ILE
- 22nd
- KEV
- Not listed
SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.
A fix is available. Apply it within your standard update timelines.
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact partial (CVSS v4.0 confidentiality and integrity impact neither High). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact partial (CVSS v4.0 confidentiality and integrity impact neither High). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
October 7, 2026
Last Modified
October 7, 2026
Advisory Details (3)
Auto-updated Oct 7, 2026Patch available. Sources: github_release, github_pr, github_commit.
GitHub commit Patch Available
commit 741b2983cc52 (coturn/coturn)
Patch available: coturn/coturn 4.11.0 (contains commit 741b2983cc52)
https://github.com/coturn/coturn/commit/741b2983cc52f967dd08c438fd72a5f08f13ca27GitHub pull request Patch Available
Extend STUN client fuzz builder coverage
Patch available: coturn/coturn 4.11.0 (PR #1878 merged 2026-04-23)
https://github.com/coturn/coturn/pull/1878GitHub release Patch Available
4.11.0
Patch available: coturn/coturn 4.11.0
https://github.com/coturn/coturn/releases/tag/4.11.0Vendor Advisories for CVE-2026-104074(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(3 across 3 ecosystems)
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| coturn | 4.12.0-1 ... 4.6.1-2 (6 versions) |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| coturn | 4.12.0-1, 4.14.0-1, 4.15.0-1, 4.18.0-1, 4.6.1-2 |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| coturn | 4.6.1-2 |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 18× in last 7d / 18× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
- 2026-10-11 20:15 UTCEG score recompute
- 2026-10-11 18:27 UTCEG score recompute
- 2026-10-11 15:01 UTCEG score recompute
- 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-10-10 21:13 UTCEG score recompute
- 2026-10-10 21:13 UTCGHSA enrichmentGHSA-6h6j-pfrh-66v3 · GitHub CVSS 5.3
- 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-10-09 21:18 UTCEG score recompute
- 2026-10-09 21:18 UTCGHSA enrichmentGHSA-6h6j-pfrh-66v3 · GitHub CVSS 5.3
- 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.3% · 21st percentile
- 2026-10-08 21:27 UTCEG score recompute
- 2026-10-08 21:27 UTCGHSA enrichmentGHSA-6h6j-pfrh-66v3 · GitHub CVSS 5.3
- 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.3% · 21st percentile
- 2026-10-07 21:25 UTCEG score recompute
- 2026-10-07 21:25 UTCGHSA enrichmentGHSA-6h6j-pfrh-66v3 · GitHub CVSS 5.3
- 2026-10-07 15:30 UTCEG score recompute
- 2026-10-07 14:42 UTCEG score recomputeFirst assessed: 5.3 MEDIUM
- 2026-10-07 14:41 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-104074?
CVE-2026-104074 is a medium-severity vulnerability; its CVE record was published on October 7, 2026. 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 stuniniterrorresponsecommonstr() function in src/client/nsturn_msg.c,…
When was CVE-2026-104074 made public?
CVE-2026-104074 was made public on April 22, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on October 7, 2026. EchelonGraph's copy of the record carries a last-modified date of October 7, 2026; the record at its source may have been updated since.
Is CVE-2026-104074 actively exploited?
CVE-2026-104074 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (22nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-104074?
CVE-2026-104074 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-104074?
A fix for CVE-2026-104074 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-104074 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-104074
Is Your Infrastructure Affected by CVE-2026-104074?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.