CVE-2015-3183

mediumpriority · attend · 46EPSS 0.745 · 99 %ileEURUUS

grimoire priorityP1 · Urgent

Exploitable?

—

no known exploitation

Likely / severe?

74.5% (99th) EPSS

CVSS 5 · medium

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-26

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.

cvss

Technical severity, 0–10. One row per scoring source.

5.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.05mediumAV:N/AC:L/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v2.05mediumAV:N/AC:L/Au:N/C:N/I:P/A:Nsecondary · FSTEC (BDU) RU

v2.05mediumAV:N/AC:L/Au:N/C:N/I:P/A:N/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-17USprimaryCWE-20USprimaryCWE-20US

affected products (4)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
Apache Software Foundation HTTP Server≤ 2.4.13fstec_bduRU
apache http server2.2.0 → 2.2.31nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server2.4.0 → 2.4.16nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2015-07-20modified 2026-06-17

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references (158)

External citations — patches, advisories, analysis.

scry

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