TinyWeb through 0.0.8 contains a memory leak vulnerability that allows unauthenticated attackers to exhaust available memory by sending ordinary well-formed HTTP requests. Each request causes HttpParser::execute() to allocate Url objects, HttpHeaders objects, and HttpHeader instances via raw new expressions that are never freed due to missing destructors and unreachable delete calls, causing worker resident memory to grow monotonically by approximately 20 to 28 kB per request until the worker process is killed.
CVE-2026-67183
HIGHPre-NVD 7.57.5—Trending — 3 sources updated this week
EchelonGraph scoreHIGH confidence
Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-28. a secondary CVSS source baseline 7.5; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 7.5Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.5
- EG Score
- 7.5(high)
- EG Risk
- 38(Track)EG Risk 38/100SSVC: Track
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 computedSeverity75% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
Published
July 28, 2026
Last Modified
July 28, 2026
Advisory Details (2)
Auto-updated Jul 28, 2026🔬 Proof of concept available. No patch confirmed yet.
generic
TinyWeb 0.0.8 Memory Leak DoS via HTTP Request Handling | Advisories | VulnCheck
https://www.vulncheck.com/advisories/tinyweb-memory-leak-dos-via-http-request-handlinggeneric🟡 PoC Available
GitHub - theopaid/Unauthenticated-Memory-Leak-Leads-To-Memory-Exhaustion-TinyWeb-: Security Advisory: Unauthenticated Memory Leak Leads To Memory Exhaustion (TinyWeb) · GitHub
https://github.com/theopaid/Unauthenticated-Memory-Leak-Leads-To-Memory-Exhaustion-TinyWeb-Vendor Advisories for CVE-2026-67183(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 5× in last 7d / 5× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.
- 2026-07-29 06:51 UTCEG score recompute
- 2026-07-29 06:51 UTCGHSA enrichment
- 2026-07-28 17:23 UTCEG score recompute
- 2026-07-28 16:54 UTCEG score recompute
- 2026-07-28 16:53 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-401
- CVE-2018-0158NVD 8.6EG 9.0 KEVEPSS p94CRITICAL
- CVE-2019-17340EG 8.8HIGH
- CVE-2019-1708EG 8.6HIGH
- CVE-2018-15377EG 8.6HIGH
- CVE-2016-6304NVD 7.5EG 8.4EPSS p99HIGH
- CVE-2019-10547EG 7.8HIGH
- CVE-2007-2274EG 7.8EPSS p94HIGH
- CVE-2015-8567EG 7.7EPSS p92HIGH
- CVE-2016-4232NVD 7.5EG 7.7EPSS p98HIGH
- CVE-2018-17240EG 7.5HIGH
Frequently asked(4)
What is CVE-2026-67183?
CVE-2026-67183 is a high vulnerability published on July 28, 2026. TinyWeb through 0.0.8 contains a memory leak vulnerability that allows unauthenticated attackers to exhaust available memory by sending ordinary well-formed HTTP requests. Each request causes HttpParser::execute() to allocate Url objects, HttpHeaders objects, and HttpHeader instances via raw new…
When was CVE-2026-67183 disclosed?
CVE-2026-67183 was first published in the National Vulnerability Database on July 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-67183?
CVE-2026-67183 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-67183?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67183, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-67183
Is Your Infrastructure Affected by CVE-2026-67183?
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