RHSA-2026:7418
Vulnerability from csaf_redhat - Published: 2026-04-10 18:51 - Updated: 2026-04-20 21:33Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Low
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs:
busybox:
* busybox-1.37.0-7.1.hum1 (aarch64, x86_64)
* busybox-petitboot-1.37.0-7.1.hum1 (aarch64, x86_64)
* busybox-shared-1.37.0-7.1.hum1 (aarch64, x86_64)
* busybox-1.37.0-7.1.hum1.src (src)
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in BusyBox wget. This vulnerability allows header injection via raw CR/LF and other C0 control bytes in the HTTP request-target. An attacker can exploit this by crafting a URL containing these control characters to inject arbitrary HTTP headers into the outgoing request, potentially leading to HTTP response splitting, cache poisoning, or security policy bypass.
5.4 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://images.redhat.com/
https://access.redhat.com/errata/RHSA-2026:7418
References
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"cwe": {
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"name": "Improper Neutralization of CRLF Sequences (\u0027CRLF Injection\u0027)"
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"text": "A flaw was found in BusyBox wget. This vulnerability allows header injection via raw CR/LF and other C0 control bytes in the HTTP request-target. An attacker can exploit this by crafting a URL containing these control characters to inject arbitrary HTTP headers into the outgoing request, potentially leading to HTTP response splitting, cache poisoning, or security policy bypass.",
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"text": "This issue arises because BusyBox wget fails to sanitize control characters in the request-target before constructing the HTTP/1.1 request line. When wget processes a URL containing raw CR (0x0D), LF (0x0A), or other C0 control bytes, these characters are passed directly into the HTTP request without percent-encoding. This breaks the expected request-line format (METHOD SP request-target SP HTTP/1.1) and allows an attacker to terminate the request line prematurely and inject arbitrary headers on subsequent lines.",
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"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
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"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
"version": "3.1"
},
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"details": "Low"
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"title": "busybox: BusyBox wget: HTTP request-target allows header injection"
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]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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