CVE-2013-4286

MEDIUMCVSS v2 · 5.85.8—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 5.8 — v2 rates that MEDIUM (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:M/Au:N/C:P/I:P/A:N. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 16.8% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
Elevated
5.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 17%CVSS v2: 5.8Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Apache Tomcat before 6.0.39, 7.x before 7.0.47, and 8.x before 8.0.0-RC3, when an HTTP connector or AJP connector is used, does not properly handle certain inconsistent HTTP request headers, which allows remote attackers to trigger incorrect identification of a request's length and conduct request-smuggling attacks via (1) multiple Content-Length headers or (2) a Content-Length header and a "Transfer-Encoding: chunked" header. NOTE: this vulnerability exists because of an incomplete fix for CVE-2005-2090.

CVSS v2.0 (legacy)
5.8MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
5.8MEDIUMlow confidence
EG Risk
47
EG Risk 47/100CISA SSVC

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
Severity58% × 45%
Exploitation40% × 40%
Automatability30% × 15%
CISA SSVC: Track at low, Track or Track* at medium and Track* or Attend at high mission impact.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
17%
EPSS %ILE
96th
KEV
Not listed

CISA SSVCTrack at low, Track or Track* at medium and Track* or Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (EG-KEV: elevated) · Automatable unknown (not published for this CVE) · Technical impact unknown (not published for this CVE). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

February 26, 2014

Last Modified

April 29, 2026

References (90)

Vendor Advisories for CVE-2013-4286(1)

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

Patch Availability(11)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibtomcat7-java (7.0.42-1ubuntu0.1) @ saucy2026-05-28ubuntu
redhatjbossweb2015-05-14redhat
redhattomcat-0:7.0.42-5.el7_02014-06-10redhat
redhattomcat72014-05-21redhat
redhattomcat6-0:6.0.37-27_patch_04.ep6.el62014-05-21redhat
redhattomcat7-0:7.0.40-9_patch_02.ep6.el62014-05-21redhat
redhattomcat62014-05-21redhat
redhatpatch2014-05-15redhat
redhattomcat6-0:6.0.24-64.el6_52014-04-23redhat
redhatjbossweb-0:7.3.1-1.Final_redhat_1.1.ep6.el52014-03-31redhat
redhatjbossweb-0:7.3.1-1.Final_redhat_1.1.ep6.el62014-03-31redhat

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.

Affected Packages

(4 across 3 ecosystems)
Debian:7(2)
PackageVulnerable rangeFix by version rangeDependents
tomcat66.0.35-6 ... 6.0.45-1~deb6u1 (13 versions)
  • every version up to 6.0.45+dfsg-1~deb7u1: fixed in 6.0.45+dfsg-1~deb7u1
—
tomcat77.0.28-4
  • every version up to 7.0.28-4+deb7u1: fixed in 7.0.28-4+deb7u1
—
Debian:6.0(1)
PackageVulnerable rangeFix by version rangeDependents
tomcat66.0.28-10 ... 6.0.41-2 (26 versions)
  • every version up to 6.0.41-2+squeeze5: fixed in 6.0.41-2+squeeze5
—
Maven(1)
PackageVulnerable rangeFix by version rangeDependents
org.apache.tomcat:tomcat8.0.0-RC1
  • every version up to 6.0.39: fixed in 6.0.39
  • 7.0.0 up to 7.0.47: fixed in 7.0.47
  • 8.0.0-RC1 up to 8.0.0-RC3: fixed in 8.0.0-RC3
—

Additional Vendor Advisories

(15)

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 3× in last 7d / 11× 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.

Showing the most recent 100 of 126 total refreshes for this CVE.

  1. 2026-10-05 17:38 UTCEPSS rescore
  2. 2026-09-30 14:58 UTCEPSS rescore
  3. 2026-09-30 00:13 UTCEG score recompute
  4. 2026-09-27 13:39 UTCEPSS rescore
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  6. 2026-09-24 13:57 UTCEPSS rescore
  7. 2026-09-18 19:21 UTCEPSS rescore
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  1. 2026-08-12 13:45 UTCEPSS rescore
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  3. 2026-08-07 16:21 UTCEPSS rescore
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  5. 2026-08-05 19:12 UTCEPSS rescore
  6. 2026-08-04 15:04 UTCEPSS rescore
  7. 2026-08-02 02:22 UTCEPSS rescore
  8. 2026-07-30 01:26 UTCEPSS rescore
  9. 2026-07-28 15:31 UTCEPSS rescore
  10. 2026-07-26 13:48 UTCEG score recompute▲ 5.80
  11. 2026-07-25 14:12 UTCEPSS rescore
  12. 2026-07-23 14:14 UTCEPSS rescore
  13. 2026-07-23 01:10 UTCEG score recompute
  14. 2026-07-23 00:13 UTCEG score recompute
  15. 2026-07-22 21:52 UTCEG score recompute
  16. 2026-07-22 14:04 UTCEPSS rescore
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  23. 2026-07-19 02:25 UTCEPSS rescore
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  25. 2026-07-18 10:00 UTCEPSS rescore
  26. 2026-07-16 16:58 UTCEPSS rescore
  27. 2026-07-15 16:54 UTCEPSS rescore
  28. 2026-07-15 16:54 UTCEPSS rescore
  29. 2026-07-15 01:56 UTCEPSS rescore
  30. 2026-07-13 22:26 UTCEPSS rescore
  31. 2026-07-11 08:23 UTCEPSS rescore
  32. 2026-07-09 19:05 UTCEPSS rescore
  33. 2026-07-08 15:10 UTCEPSS rescore
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  37. 2026-07-01 15:02 UTCEPSS rescore
  38. 2026-06-30 23:19 UTCEPSS rescore
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  40. 2026-06-29 14:02 UTCEPSS rescore
  41. 2026-06-28 14:03 UTCEPSS rescore
  42. 2026-06-28 04:53 UTCEPSS rescore
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  44. 2026-06-27 03:05 UTCEPSS rescore
  45. 2026-06-25 13:46 UTCEPSS rescore
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  47. 2026-06-24 14:02 UTCEPSS rescore
  48. 2026-06-23 21:30 UTCEPSS rescore
  49. 2026-06-21 14:53 UTCEPSS rescore
  50. 2026-06-21 01:57 UTCEPSS rescore
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  52. 2026-06-19 19:23 UTCEPSS rescore
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  54. 2026-06-18 17:49 UTCEPSS rescore
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  62. 2026-06-13 22:57 UTCEPSS rescore
  63. 2026-06-12 23:08 UTCEPSS rescore
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  65. 2026-06-10 13:18 UTCEPSS rescore
  66. 2026-06-08 14:14 UTCEPSS rescore
  67. 2026-06-07 15:22 UTCEPSS rescore
  68. 2026-06-06 13:45 UTCEPSS rescore
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  74. 2026-06-02 20:10 UTCEPSS rescore
  75. 2026-06-02 20:10 UTCEPSS rescore

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Frequently asked(4)

What is CVE-2013-4286?
CVE-2013-4286 is a medium vulnerability published on February 26, 2014. Apache Tomcat before 6.0.39, 7.x before 7.0.47, and 8.x before 8.0.0-RC3, when an HTTP connector or AJP connector is used, does not properly handle certain inconsistent HTTP request headers, which allows remote attackers to trigger incorrect identification of a request's length and conduct…
When was CVE-2013-4286 disclosed?
CVE-2013-4286 was first published on February 26, 2014, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2013-4286 actively exploited?
CVE-2013-4286 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17% probability of exploitation in the next 30 days (96th percentile of EPSS-scored CVEs).
How do I remediate CVE-2013-4286?
A fix for CVE-2013-4286 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2013-4286 are linked in the Vendor Advisories panel on this page.

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