CVE-2025-61689Public exploitNetwork attack vector

Response splitting via unchecked CRLF in headers

Published Oct 10, 2025 · Updated Oct 10, 2025

HTTP response splitting in JuliaWeb HTTP.jl before 1.10.19 allows remote attackers to inject headers through crafted CRLF characters. Header construction accepts names and values containing carriage-return and line-feed characters and serializes them into HTTP messages without rejection. Exploitation requires an application to place attacker-controlled data in a request or response header; successful injection enables cache poisoning, XSS, or session fixation.

CVSS severityUnavailable
Unscored
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTTP response splitting in JuliaWeb HTTP.jl before 1.10.19 allows remote attackers to inject headers through crafted CRLF characters. Header construction accepts names and values containing carriage-return and line-feed characters and serializes them into HTTP messages without rejection. Exploitation requires an application to place attacker-controlled data in a request or response header; successful injection enables cache poisoning, XSS, or session fixation.

The record

CVE
CVE-2025-61689
Published
Oct 10, 2025
Updated
Oct 10, 2025
Vendor
JuliaWeb
Product
HTTP.jl
Classifications
CWE-113, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.10.19

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

JuliaWeb · HTTP.jlversion=< 1.10.19

Published CVSS scores

8.7GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N/E:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-113Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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