CVE-2026-33930

MEDIUMPre-NVD 5.95.9
EchelonGraph scoreHIGH confidence

Score 5.9 from GitHub Security Advisory (severity: HIGH) published 2026-07-29. a secondary CVSS source baseline 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.9Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Apache Traffic Server copies the client Host header into a fixed-size stack buffer without a bound during redirect handling, so an over-long Host header overflows the stack when redirect following is enabled.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

CVSS v3
5.9
EG Score
5.9(high)
EG Risk
27(Track)
EG Risk 27/100SSVC: 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 computed
Severity59% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

Published

July 29, 2026

Last Modified

July 30, 2026

Advisory Details (1)

Auto-updated Jul 29, 2026
No patch confirmed yet.

Vendor Advisories for CVE-2026-33930(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 9× in last 7d / 9× 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.

  1. 2026-07-30 15:13 UTCGHSA enrichment
  2. 2026-07-30 14:42 UTCEG score recompute
  3. 2026-07-30 14:42 UTCGHSA enrichment
  4. 2026-07-30 01:30 UTCEPSS rescore
  5. 2026-07-29 13:18 UTCEG score recompute
  6. 2026-07-29 13:18 UTCGHSA enrichment
  7. 2026-07-29 08:18 UTCEG score recompute
  8. 2026-07-29 07:40 UTCEG score recompute
  9. 2026-07-29 07:37 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-33930?
CVE-2026-33930 is a medium vulnerability published on July 29, 2026. Apache Traffic Server copies the client Host header into a fixed-size stack buffer without a bound during redirect handling, so an over-long Host header overflows the stack when redirect following is enabled. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through…
When was CVE-2026-33930 disclosed?
CVE-2026-33930 was first published in the National Vulnerability Database on July 29, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33930 actively exploited?
CVE-2026-33930 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 85.9% of all scored CVEs.
What is the CVSS score of CVE-2026-33930?
CVE-2026-33930 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-33930?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33930, 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-2026-33930

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