CVE-2015-3183

NONECVSS 0.0Elevated
0.0
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • 215 internet-exposed hosts are running an affected version right now
  • High exploitation likelihood — EPSS 73%
CISA-KEV: Not listedEPSS: 73%CVSS: —Exploit: NoneExposed: 215

A fix is available — apply it.

The chunked transfer coding implementation in the Apache HTTP Server before 2.4.14 does not properly parse chunk headers, which allows remote attackers to conduct HTTP request smuggling attacks via a crafted request, related to mishandling of large chunk-size values and invalid chunk-extension characters in modules/http/http_filters.c.

Live · internet exposure

215 internet-exposed hosts are running an affected version of CVE-2015-3183 right now.

across 42 countries (United States, Japan, France, United Kingdom, Canada)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
0.0(none)
EG Risk
0
EG Risk 0/100

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. It is distinct from the 0–10 EG Score, which measures severity.

EPSS
99.4%
KEV
Not listed

Published

July 20, 2015

Last Modified

May 6, 2026

References (106)

Vendor Advisories for CVE-2015-3183(1)

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

Patch Availability(12)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuapache2.2-bin (2.4.10-9ubuntu1.1) @ vivid2026-05-23ubuntu
redhatpatch2016-10-12redhat
redhattomcat-native-0:1.1.34-5.redhat_1.ep6.el62016-10-12redhat
redhattomcat-native-0:1.1.34-5.redhat_1.ep6.el72016-10-12redhat
redhathttpd2016-01-21redhat
redhatmod_cluster-native-0:1.2.9-6.Final_redhat_2.ep6.el72016-01-21redhat
redhattomcat-vault-0:1.0.8-4.Final_redhat_4.1.ep7.el62015-12-16redhat
redhatpatch2015-12-16redhat
redhattomcat-vault-0:1.0.8-4.Final_redhat_4.1.ep7.el72015-12-16redhat
redhathttpd-0:2.4.6-31.ael7b_1.12015-08-24redhat
redhathttpd-0:2.2.15-47.el6_72015-08-24redhat
redhathttpd24-httpd-0:2.4.12-6.el7.12015-08-24redhat

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

(11)

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 12× in last 7d / 31× 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. 2026-07-23 01:17 UTCEG score recompute▼ 7.10
  2. 2026-07-23 00:19 UTCEG score recompute▲ 7.10
  3. 2026-07-22 21:58 UTCEG score recompute
  4. 2026-07-22 14:04 UTCEPSS rescore
  5. 2026-07-21 15:21 UTCEPSS rescore
  6. 2026-07-21 15:21 UTCEPSS rescore
  7. 2026-07-20 17:03 UTCEPSS rescore
  8. 2026-07-19 14:27 UTCEPSS rescore
  9. 2026-07-19 14:27 UTCEPSS rescore
  10. 2026-07-18 10:00 UTCEPSS rescore
  11. 2026-07-16 16:59 UTCEPSS rescore
  12. 2026-07-16 16:59 UTCEPSS rescore
  13. 2026-07-15 16:54 UTCEPSS rescore
  14. 2026-07-15 16:54 UTCEPSS rescore
  15. 2026-07-13 22:26 UTCEPSS rescore
  16. 2026-07-12 16:07 UTCOSV refresh
  17. 2026-07-11 08:23 UTCEPSS rescore
  18. 2026-07-05 02:26 UTCEPSS rescore
  19. 2026-07-02 15:21 UTCEPSS rescore
  20. 2026-07-01 15:02 UTCEPSS rescore
  21. 2026-07-01 15:02 UTCEPSS rescore
  22. 2026-06-30 23:19 UTCEPSS rescore
  23. 2026-06-30 23:19 UTCEPSS rescore
  24. 2026-06-29 14:03 UTCEPSS rescore
  25. 2026-06-27 03:05 UTCEPSS rescore
Show 49 more
  1. 2026-06-25 13:47 UTCEPSS rescore
  2. 2026-06-25 13:47 UTCEPSS rescore
  3. 2026-06-24 14:02 UTCEPSS rescore
  4. 2026-06-24 14:02 UTCEPSS rescore
  5. 2026-06-23 21:30 UTCEPSS rescore
  6. 2026-06-23 21:29 UTCOSV refresh
  7. 2026-06-19 19:23 UTCEPSS rescore
  8. 2026-06-19 19:23 UTCEPSS rescore
  9. 2026-06-17 17:49 UTCEPSS rescore
  10. 2026-06-16 17:50 UTCEPSS rescore
  11. 2026-06-16 17:49 UTCEPSS rescore
  12. 2026-06-15 17:45 UTCEPSS rescore
  13. 2026-06-14 23:14 UTCEPSS rescore
  14. 2026-06-13 22:57 UTCEPSS rescore
  15. 2026-06-12 23:09 UTCEPSS rescore
  16. 2026-06-11 13:57 UTCEPSS rescore
  17. 2026-06-10 22:15 UTCEPSS rescore
  18. 2026-06-07 05:27 UTCOSV refresh
  19. 2026-06-06 13:45 UTCEPSS rescore
  20. 2026-06-05 22:44 UTCEPSS rescore
  21. 2026-06-04 13:10 UTCEPSS rescore
  22. 2026-06-04 13:09 UTCEPSS rescore
  23. 2026-06-02 20:10 UTCEPSS rescore
  24. 2026-06-02 20:10 UTCEPSS rescore
  25. 2026-06-01 13:49 UTCEPSS rescore
  26. 2026-06-01 13:49 UTCEPSS rescore
  27. 2026-05-31 00:14 UTCEPSS rescore
  28. 2026-05-29 13:41 UTCEPSS rescore
  29. 2026-05-28 13:42 UTCEPSS rescore
  30. 2026-05-28 13:42 UTCEPSS rescore
  31. 2026-05-27 13:38 UTCEPSS rescore
  32. 2026-05-27 13:38 UTCEPSS rescore
  33. 2026-05-26 13:41 UTCEPSS rescore
  34. 2026-05-26 13:41 UTCEPSS rescore
  35. 2026-05-24 16:43 UTCEPSS rescore
  36. 2026-05-23 15:10 UTCEPSS rescore
  37. 2026-05-23 00:24 UTCEG score recompute
  38. 2026-05-23 00:24 UTCVendor advisory
  39. 2026-05-23 00:24 UTCGHSA enrichment
  40. 2026-05-22 21:15 UTCEPSS rescore
  41. 2026-05-22 21:15 UTCEPSS rescore
  42. 2026-05-21 22:40 UTCEPSS rescore
  43. 2026-05-20 22:37 UTCEPSS rescore
  44. 2026-05-20 22:37 UTCEPSS rescore
  45. 2026-05-20 11:21 UTCEPSS rescore
  46. 2026-05-20 11:21 UTCEPSS rescore
  47. 2026-05-20 11:21 UTCEPSS rescore
  48. 2026-05-18 21:30 UTCEPSS rescore
  49. 2026-05-18 21:30 UTCEPSS rescore

Frequently asked(4)

What is CVE-2015-3183?
CVE-2015-3183 is a none vulnerability published on July 20, 2015. The chunked transfer coding implementation in the Apache HTTP Server before 2.4.14 does not properly parse chunk headers, which allows remote attackers to conduct HTTP request smuggling attacks via a crafted request, related to mishandling of large chunk-size values and invalid chunk-extension…
When was CVE-2015-3183 disclosed?
CVE-2015-3183 was first published in the National Vulnerability Database on July 20, 2015, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2015-3183 actively exploited?
CVE-2015-3183 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2015-3183?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-3183, 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

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