CVE-2025-52479: CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection') in JuliaWeb HTTP.jl
HTTP.jl provides HTTP client and server functionality for Julia, and URIs.jl parses and works with Uniform Resource Identifiers (URIs). URIs.jl prior to version 1.6.0 and HTTP.jl prior to version 1.10.17 allows the construction of URIs containing CR/LF characters. If user input was not otherwise escaped or protected, this can lead to a CRLF injection attack. Users of HTTP.jl should upgrade immediately to HTTP.jl v1.10.17, and users of URIs.jl should upgrade immediately to URIs.jl v1.6.0. The check for valid URIs is now in the URI.jl package, and the latest version of HTTP.jl incorporates that fix. As a workaround, manually validate any URIs before passing them on to functions in this package.
AI Analysis
Technical Summary
CVE-2025-52479 is a high-severity vulnerability in JuliaWeb's HTTP.jl and URIs.jl packages that permits improper neutralization of CRLF sequences (CWE-93). Versions of URIs.jl before 1.6.0 and HTTP.jl before 1.10.17 allow URIs to be constructed with CR/LF characters, enabling CRLF injection attacks if user input is not otherwise sanitized. The fix involves enhanced URI validation incorporated into URI.jl and integrated into HTTP.jl 1.10.17. The vulnerability has a CVSS 4.0 base score of 7.7, indicating a high impact with network attack vector and no required privileges or user interaction.
Potential Impact
If exploited, this vulnerability could allow an attacker to inject CRLF characters into HTTP headers or URIs, potentially leading to HTTP response splitting or other injection-based attacks. This may affect the integrity of HTTP communications handled by the vulnerable versions of HTTP.jl and URIs.jl. There are no known exploits in the wild at this time.
Mitigation Recommendations
A fix is available by upgrading to HTTP.jl version 1.10.17 and URIs.jl version 1.6.0, which include proper URI validation to prevent CRLF injection. As a temporary workaround, users should manually validate and sanitize any URIs before passing them to these packages. Patch status is confirmed by the vendor advisory embedded in the description.
CVE-2025-52479: CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection') in JuliaWeb HTTP.jl
Description
HTTP.jl provides HTTP client and server functionality for Julia, and URIs.jl parses and works with Uniform Resource Identifiers (URIs). URIs.jl prior to version 1.6.0 and HTTP.jl prior to version 1.10.17 allows the construction of URIs containing CR/LF characters. If user input was not otherwise escaped or protected, this can lead to a CRLF injection attack. Users of HTTP.jl should upgrade immediately to HTTP.jl v1.10.17, and users of URIs.jl should upgrade immediately to URIs.jl v1.6.0. The check for valid URIs is now in the URI.jl package, and the latest version of HTTP.jl incorporates that fix. As a workaround, manually validate any URIs before passing them on to functions in this package.
CVSS v4.0
Score 7.7high
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-52479 is a high-severity vulnerability in JuliaWeb's HTTP.jl and URIs.jl packages that permits improper neutralization of CRLF sequences (CWE-93). Versions of URIs.jl before 1.6.0 and HTTP.jl before 1.10.17 allow URIs to be constructed with CR/LF characters, enabling CRLF injection attacks if user input is not otherwise sanitized. The fix involves enhanced URI validation incorporated into URI.jl and integrated into HTTP.jl 1.10.17. The vulnerability has a CVSS 4.0 base score of 7.7, indicating a high impact with network attack vector and no required privileges or user interaction.
Potential Impact
If exploited, this vulnerability could allow an attacker to inject CRLF characters into HTTP headers or URIs, potentially leading to HTTP response splitting or other injection-based attacks. This may affect the integrity of HTTP communications handled by the vulnerable versions of HTTP.jl and URIs.jl. There are no known exploits in the wild at this time.
Mitigation Recommendations
A fix is available by upgrading to HTTP.jl version 1.10.17 and URIs.jl version 1.6.0, which include proper URI validation to prevent CRLF injection. As a temporary workaround, users should manually validate and sanitize any URIs before passing them to these packages. Patch status is confirmed by the vendor advisory embedded in the description.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2025-06-17T02:28:39.717Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 685c2224c6576a567aed81d9
Added to database: 06/25/2025, 16:21:56 UTC
Last enriched: 05/08/2026, 01:41:16 UTC
Last updated: 09/10/2026, 19:36:51 UTC
Views: 226
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