RHSA-2026:11768
Vulnerability from csaf_redhat - Published: 2026-04-29 14:26 - Updated: 2026-04-30 13:35Summary
Red Hat Security Advisory: Red Hat Update Infrastructure 5.2 Technology Preview security update
Severity
Important
Notes
Topic: A new set of Red Hat Update Infrastructure container images is now available as a Technology Preview in the Red Hat container registry.
Details: Technology Preview features are not fully supported, may not be functionally complete, and are not suitable for deployment in production.
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 libarchive. This heap out-of-bounds read vulnerability exists in the RAR archive processing logic due to improper validation of the LZSS sliding window size after transitions between compression methods. A remote attacker can exploit this by providing a specially crafted RAR archive, leading to the disclosure of sensitive heap memory information without requiring authentication or user interaction.
7.5 (High)
Vendor Fix
Please consult the RHUI Technology Preview Release Notes at https://access.redhat.com/articles/7141172
for instructions on how to use this image set.
https://access.redhat.com/errata/RHSA-2026:11768
Workaround
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
A flaw was found in the Python webbrowser.open() API. If a specially crafted URL containing "%action" is processed, an attacker could bypass a previous mitigation for CVE-2026-4519. This bypass allows for command injection into the underlying shell, potentially leading to arbitrary code execution.
7.1 (High)
Vendor Fix
Please consult the RHUI Technology Preview Release Notes at https://access.redhat.com/articles/7141172
for instructions on how to use this image set.
https://access.redhat.com/errata/RHSA-2026:11768
Workaround
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
A flaw was found in libarchive. On 32-bit systems, an integer overflow vulnerability exists in the zisofs block pointer allocation logic. A remote attacker can exploit this by providing a specially crafted ISO9660 image, which can lead to a heap buffer overflow. This could potentially allow for arbitrary code execution on the affected system.
7.5 (High)
Vendor Fix
Please consult the RHUI Technology Preview Release Notes at https://access.redhat.com/articles/7141172
for instructions on how to use this image set.
https://access.redhat.com/errata/RHSA-2026:11768
Workaround
To mitigate this issue, avoid processing untrusted ISO9660 images with applications that utilize `libarchive`. Users should only extract or read content from ISO images obtained from trusted sources.
A flaw was found in Python's decompression modules, including `lzma.LZMADecompressor`, `bz2.BZ2Decompressor`, and `gzip.GzipFile`. This vulnerability, a use-after-free, can occur if a program attempts to re-use a decompression object after a memory allocation error, especially when the system is experiencing high memory usage. Exploitation of this flaw could potentially allow an attacker to execute arbitrary code or access sensitive data. The vulnerability is only present if the program re-uses decompressor instances across multiple decompression calls even after a `MemoryError` is raised during decompression. Using the helper functions to one-shot decompress data such as `lzma.decompress()`, `bz2.decompress()`, `gzip.decompress()`, and `zlib.decompress()` are not affected as a new decompressor instance is used per call. If the decompressor instance is not re-used after an error condition, this usage is similarly not vulnerable.
8.1 (High)
Vendor Fix
Please consult the RHUI Technology Preview Release Notes at https://access.redhat.com/articles/7141172
for instructions on how to use this image set.
https://access.redhat.com/errata/RHSA-2026:11768
Workaround
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
The Go standard library function net/url.Parse insufficiently validated the host/authority component and accepted some invalid URLs by effectively treating garbage before an IP-literal as ignorable. The function should have rejected this as invalid.
7.5 (High)
Vendor Fix
Please consult the RHUI Technology Preview Release Notes at https://access.redhat.com/articles/7141172
for instructions on how to use this image set.
https://access.redhat.com/errata/RHSA-2026:11768
Workaround
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
A flaw was found in nghttp2. Due to missing internal state validation, the library continues to process incoming data even after a session has been terminated. A remote attacker could exploit this by sending a specially crafted HTTP/2 frame, leading to an assertion failure and a denial of service (DoS).
7.5 (High)
Vendor Fix
Please consult the RHUI Technology Preview Release Notes at https://access.redhat.com/articles/7141172
for instructions on how to use this image set.
https://access.redhat.com/errata/RHSA-2026:11768
A flaw was found in Vim, an open-source command-line text editor. Specifically, an operating system (OS) command injection vulnerability exists in the `netrw` standard plugin. A remote attacker could exploit this by tricking a user into opening a specially crafted URL, such as one using the `scp://` protocol handler. Successful exploitation allows the attacker to execute arbitrary shell commands with the same privileges as the Vim process, leading to potential system compromise.
4.4 (Medium)
Vendor Fix
Please consult the RHUI Technology Preview Release Notes at https://access.redhat.com/articles/7141172
for instructions on how to use this image set.
https://access.redhat.com/errata/RHSA-2026:11768
Workaround
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
A flaw was found in Vim. This vulnerability, a heap-buffer-overflow and a segmentation fault, exists in the swap file recovery logic. A local attacker could exploit this by providing a specially crafted swap file. This could lead to a denial of service (DoS) or potentially information disclosure.
5.3 (Medium)
Vendor Fix
Please consult the RHUI Technology Preview Release Notes at https://access.redhat.com/articles/7141172
for instructions on how to use this image set.
https://access.redhat.com/errata/RHSA-2026:11768
Workaround
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
A flaw was found in Vim. By including a newline character in a pattern passed to Vim's glob() function, an attacker may be able to execute arbitrary shell commands. This command injection vulnerability allows for arbitrary code execution, depending on the user's shell settings.
7.3 (High)
Vendor Fix
Please consult the RHUI Technology Preview Release Notes at https://access.redhat.com/articles/7141172
for instructions on how to use this image set.
https://access.redhat.com/errata/RHSA-2026:11768
References
Acknowledgments
Elhanan Haenel
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"text": "A flaw was found in libarchive. This heap out-of-bounds read vulnerability exists in the RAR archive processing logic due to improper validation of the LZSS sliding window size after transitions between compression methods. A remote attacker can exploit this by providing a specially crafted RAR archive, leading to the disclosure of sensitive heap memory information without requiring authentication or user interaction.",
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"text": "libarchive: libarchive: Information disclosure via heap out-of-bounds read in RAR archive processing",
"title": "Vulnerability summary"
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"text": "IMPORTANT: This heap out-of-bounds read vulnerability in libarchive\u0027s RAR archive processing logic can lead to information disclosure. A remote attacker can exploit this flaw by providing a specially crafted RAR archive, potentially revealing sensitive heap memory information without requiring authentication or user interaction on systems that process untrusted archives.",
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"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
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"title": "libarchive: libarchive: Information disclosure via heap out-of-bounds read in RAR archive processing"
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{
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"title": "Vulnerability description"
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"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
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},
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"title": "Statement"
},
{
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"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
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{
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"title": "Vulnerability description"
},
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"text": "python: Python: Arbitrary code execution or information disclosure via use-after-free in decompression modules",
"title": "Vulnerability summary"
},
{
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"text": "The severity of this flaw is somewhat mitigated on Red Hat platforms. By default processes are not executed with root user privilege and are limited in their scope which in turn limits the impact of this flaw.",
"title": "Statement"
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{
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"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"text": "The Go standard library function net/url.Parse insufficiently validated the host/authority component and accepted some invalid URLs by effectively treating garbage before an IP-literal as ignorable. The function should have rejected this as invalid.",
"title": "Vulnerability description"
},
{
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},
{
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"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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{
"category": "impact",
"details": "Moderate"
}
],
"title": "vim: Vim: Denial of service and information disclosure via crafted swap file"
},
{
"cve": "CVE-2026-33412",
"cwe": {
"id": "CWE-78",
"name": "Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)"
},
"discovery_date": "2026-03-24T20:02:21.511965+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2450907"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Vim. By including a newline character in a pattern passed to Vim\u0027s glob() function, an attacker may be able to execute arbitrary shell commands. This command injection vulnerability allows for arbitrary code execution, depending on the user\u0027s shell settings.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "vim: Vim: Arbitrary code execution via command injection in glob() function",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
"Red Hat Update Infrastructure 5:registry.redhat.io/rhui5/cds-kubernetes-tp-rhel9@sha256:9c099abe9fe9f06816a9ddd95c8123bd2909e66aa31b05ce5a143495efedd274_amd64",
"Red Hat Update Infrastructure 5:registry.redhat.io/rhui5/installer-tp-rhel9@sha256:9827772c3fffde2b94ac6758eb146209973bb09bd86980e02cd0cafa66f4aa3e_amd64",
"Red Hat Update Infrastructure 5:registry.redhat.io/rhui5/rhua-tp-rhel9@sha256:1debabb74204bd06904737367b77cb42ab5d69e73da5c051e74e8dbc7e6719fa_amd64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-33412"
},
{
"category": "external",
"summary": "RHBZ#2450907",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2450907"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-33412",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-33412"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-33412",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33412"
},
{
"category": "external",
"summary": "https://github.com/vim/vim/commit/645ed6597d1ea896c712cd7ddbb6edee79577e9a",
"url": "https://github.com/vim/vim/commit/645ed6597d1ea896c712cd7ddbb6edee79577e9a"
},
{
"category": "external",
"summary": "https://github.com/vim/vim/releases/tag/v9.2.0202",
"url": "https://github.com/vim/vim/releases/tag/v9.2.0202"
},
{
"category": "external",
"summary": "https://github.com/vim/vim/security/advisories/GHSA-w5jw-f54h-x46c",
"url": "https://github.com/vim/vim/security/advisories/GHSA-w5jw-f54h-x46c"
}
],
"release_date": "2026-03-24T19:43:07.219000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-04-29T14:26:51+00:00",
"details": "Please consult the RHUI Technology Preview Release Notes at https://access.redhat.com/articles/7141172\nfor instructions on how to use this image set.",
"product_ids": [
"Red Hat Update Infrastructure 5:registry.redhat.io/rhui5/cds-kubernetes-tp-rhel9@sha256:9c099abe9fe9f06816a9ddd95c8123bd2909e66aa31b05ce5a143495efedd274_amd64",
"Red Hat Update Infrastructure 5:registry.redhat.io/rhui5/installer-tp-rhel9@sha256:9827772c3fffde2b94ac6758eb146209973bb09bd86980e02cd0cafa66f4aa3e_amd64",
"Red Hat Update Infrastructure 5:registry.redhat.io/rhui5/rhua-tp-rhel9@sha256:1debabb74204bd06904737367b77cb42ab5d69e73da5c051e74e8dbc7e6719fa_amd64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:11768"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
"Red Hat Update Infrastructure 5:registry.redhat.io/rhui5/cds-kubernetes-tp-rhel9@sha256:9c099abe9fe9f06816a9ddd95c8123bd2909e66aa31b05ce5a143495efedd274_amd64",
"Red Hat Update Infrastructure 5:registry.redhat.io/rhui5/installer-tp-rhel9@sha256:9827772c3fffde2b94ac6758eb146209973bb09bd86980e02cd0cafa66f4aa3e_amd64",
"Red Hat Update Infrastructure 5:registry.redhat.io/rhui5/rhua-tp-rhel9@sha256:1debabb74204bd06904737367b77cb42ab5d69e73da5c051e74e8dbc7e6719fa_amd64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "vim: Vim: Arbitrary code execution via command injection in glob() function"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
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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