CVE-2023-38709
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Apache HTTP Server: HTTP response splitting
rank 24 = 16 + 0 + 1 + 7 + 0
rank@v1 · backlog
Someone is already using it
CISA KEV catalog · public proof-of-concept · FIRST EPSS
EPSS 0.03914 · without this subject the record ranks 8
What it costs you if it fires
NVD CVSS base score, then the CNA's own
no CVSS held by anyone · without this subject the record ranks 24
It is getting worse, not staying still
FIRST EPSS series, rescorings and bad loads removed
rose on 2025-11-18 · without this subject the record ranks 23
How much of the world it touches
NVD CPE configurations
8 products in the CPE ranges · without this subject the record ranks 17
Someone else already set the date
CISA KEV remediation due date
no CISA due date · without this subject the record ranks 24
Hindsight · the state
Foresight · where to check next
This record is one instance of CWE-1284, improper validation of specified quantity in input. The index holds 417 prior instances of this class, 2 KEV-listed. The nearest of its KEV-listed records are drawn beside this. taxonomy@v1
Running Apache HTTP Server? Check your version
A deterministic range check against the ranges this record publishes. It tells you where a version sits in the record, not whether your deployment is exploitable. No account needed.
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Harm, if it fires from the vector and the weakness
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CISA KEV & Federal Remediation Deadline from the record and CISA
The fix, and how long it's been waiting.
Exploit Status & Known PoCs a ladder, not a score
Current rung: Proof-of-concept published · 1 public repository, 2024-10-05.
- RUNG 1Nothing observed in held sources
- RUNG 2Proof-of-concept published · 1 public repository2024-10-05receipt
- RUNG 3Exploited in the wild · CISA KEV listed
- RUNG 4Ransomware campaign use known
Affected & Fixed Versions as published
Show all 8 published ranges
A rung lights from a row in the index, never from an assessment. "Held sources" is the true scope of the claim: this index reads the CVE record, NVD, CISA KEV, FIRST's EPSS and public proof-of-concept repositories, and it does not observe attacks.
What it is stated by the CNA
Faulty input validation in the core of Apache allows malicious or exploitable backend/content generators to split HTTP responses. This issue affects Apache HTTP Server: through 2.4.58. receipt
NVD's analysis a second authority
- weakness
- CWE-1284
- affected versions
- apache http server < 2.4.59; debian linux 10.0; fedoraproject fedora 38; and 5 more, listed in full below
- also scored by
- 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
check it yourself httpd.apache.org security.netapp.com lists.fedoraproject.org openwall.com lists.fedoraproject.org lists.fedoraproject.org +3 morereceipt
Dated events
Movement the material steps
This score more than doubled inside 72 hours. Both observations are in the full history below.
Show all 68 observations
68 observations held. A highlighted step crossed a promotion threshold. A step marked with a scoring model moved because the instrument was replaced, not because the vulnerability changed. receipt
The pattern, elsewhere
This record is one instance of CWE-1284, improper validation of specified quantity in input. The index holds 417 prior instances of this class, 2 KEV-listed. The nearest of its KEV-listed records are drawn beside this. [email protected]
"Matches n of m" counts the attributes the two records can both be compared on: the CVSS metrics they share a version of, any weakness class beyond this one, and the vendor. fit-rules@v1
417 records in this class held. The six above are drawn from the ones CISA has listed as exploited, ranked by how much of the record matches this one. That is why every one of them is KEV-listed: the pool is, so the colour on those spokes says nothing the pool has not already said.
No curated product neighbourhood is held for this product, so the records above are the nearest this index can name. The neighbourhood table covers a small set of products and is extended by hand.
Siblings and hubs
Records related to this one
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What usually comes next
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