CVE-2006-3918

NONECVSS 0.09.0▲
EchelonGraph scoreLOW confidence

Score elevated to 9.0 because EPSS predicts 91% probability of exploitation within the next 30 days (top 0.3% of all CVEs). Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss
Weaponized
0.0
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • 1 internet-exposed host is running an affected version right now
  • High exploitation likelihood — EPSS 95%
CISA-KEV: Not listedEPSS: 95%CVSS: —Exploit: NoneExposed: 1

A fix is available — apply it.

http_protocol.c in (1) IBM HTTP Server 6.0 before 6.0.2.13 and 6.1 before 6.1.0.1, and (2) Apache HTTP Server 1.3 before 1.3.35, 2.0 before 2.0.58, and 2.2 before 2.2.2, does not sanitize the Expect header from an HTTP request when it is reflected back in an error message, which might allow cross-site scripting (XSS) style attacks using web client components that can send arbitrary headers in requests, as demonstrated using a Flash SWF file.

Live · internet exposure

1 internet-exposed host is running an affected version of CVE-2006-3918 right now.

across 1 countries (United States)top: http_server
See the live KEV-Exposure radar →Found passively from public internet-scan data — aggregate, host-redacted.

EchelonGraph is the only CVE feed that fuses live vulnerability intelligence with its own live internet-exposure radar — so you see not just that a CVE is exploited, but how much of the internet is exposed to it right now.

CVSS v3
—
EG Score
9.0(low)
EPSS
99.9%
KEV
Not listed

Published

July 28, 2006

Last Modified

April 16, 2026

References (112)

Vendor Advisories for CVE-2006-3918(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuapache2-mpm-prefork (2.0.55-4ubuntu2.3) @ dapper2026-05-31ubuntu
redhatxml-commons-0:1.3.02-2jpp_1rh2010-08-04redhat
redhatrhn-modperl-0:1.29-16.rhel42008-06-30redhat
redhatpatch2006-09-29redhat
redhathttpd-0:2.0.52-28.ent2006-08-10redhat
redhatpatch2006-08-08redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Additional Vendor Advisories

(5)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 5× in last 7d / 17× 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. 2026-07-13 06:07 UTCEPSS rescore
  2. 2026-07-13 06:07 UTCEPSS rescore
  3. 2026-07-11 08:22 UTCEPSS rescore
  4. 2026-07-09 19:03 UTCEPSS rescore
  5. 2026-07-08 20:39 UTCOSV refresh
  6. 2026-06-27 03:04 UTCEPSS rescore
  7. 2026-06-25 13:46 UTCEPSS rescore
  8. 2026-06-24 14:01 UTCEPSS rescore
  9. 2026-06-24 14:01 UTCEPSS rescore
  10. 2026-06-23 21:29 UTCEPSS rescore
  11. 2026-06-23 21:29 UTCEPSS rescore
  12. 2026-06-22 14:22 UTCEPSS rescore
  13. 2026-06-21 01:56 UTCEPSS rescore
  14. 2026-06-20 08:12 UTCOSV refresh
  15. 2026-06-19 19:22 UTCEPSS rescore
  16. 2026-06-19 19:22 UTCEPSS rescore
  17. 2026-06-15 17:44 UTCEPSS rescore
  18. 2026-06-13 22:56 UTCEPSS rescore
  19. 2026-06-12 23:08 UTCEPSS rescore
  20. 2026-06-10 22:14 UTCEPSS rescore
  21. 2026-06-06 13:44 UTCEPSS rescore
  22. 2026-06-06 13:44 UTCEPSS rescore
  23. 2026-06-05 22:43 UTCEPSS rescore
  24. 2026-05-31 22:28 UTCEPSS rescore
  25. 2026-05-31 07:28 UTCEG score recompute
Show 14 more
  1. 2026-05-31 07:28 UTCVendor advisory
  2. 2026-05-31 07:28 UTCGHSA enrichment
  3. 2026-05-27 13:37 UTCEPSS rescore
  4. 2026-05-27 13:37 UTCEPSS rescore
  5. 2026-05-26 13:41 UTCEPSS rescore
  6. 2026-05-26 13:41 UTCEPSS rescore
  7. 2026-05-26 07:16 UTCEPSS rescore
  8. 2026-05-26 07:16 UTCEPSS rescore
  9. 2026-05-22 23:25 UTCOSV refresh
  10. 2026-05-22 21:15 UTCEPSS rescore
  11. 2026-05-22 21:15 UTCEPSS rescore
  12. 2026-05-20 22:36 UTCEPSS rescore
  13. 2026-05-20 22:36 UTCEPSS rescore
  14. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-28424✓ verified
    First seen Aug 24, 2006

    Apache 1.3.35/2.0.58/2.2.2 - Arbitrary HTTP Request Headers Security

    Open source ↗

Frequently asked(4)

What is CVE-2006-3918?
CVE-2006-3918 is a none vulnerability published on July 28, 2006. http_protocol.c in (1) IBM HTTP Server 6.0 before 6.0.2.13 and 6.1 before 6.1.0.1, and (2) Apache HTTP Server 1.3 before 1.3.35, 2.0 before 2.0.58, and 2.2 before 2.2.2, does not sanitize the Expect header from an HTTP request when it is reflected back in an error message, which might allow…
When was CVE-2006-3918 disclosed?
CVE-2006-3918 was first published in the National Vulnerability Database on July 28, 2006, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2006-3918 actively exploited?
CVE-2006-3918 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2006-3918?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2006-3918, 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-2006-3918

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