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12 vulnerabilities by CISAgov
CVE-2026-19671 (GCVE-0-2026-19671)
Vulnerability from nvd – Published: 2026-08-18 19:11 – Updated: 2026-08-18 19:45
VLAI
EPSS
VEX
Title
Improper handling of highly compressed data (data amplification) in CISA Malcolm
Summary
Malcolm's upload-processing pipeline (scripts/safe-extract.py) enforces entry-count, nesting-depth, and total-uncompressed-byte limits when extracting container archives (zip/tar/rar/7z via libarchive), but those limits are not applied when the uploaded file is a single-stream compressed format (.gz, .bz2, .xz, .lzma, .lz) that isn't a .tar.*-style archive. Any authenticated user permitted to upload PCAP/log files can upload a small, highly compressible file (e.g. a gzip bomb) that decompresses to an effectively unbounded size on disk, exhausting the shared Docker volume used by OpenSearch, Logstash, Arkime, and Zeek, and disrupting the platform for all users.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CNA · icscert (v2.0.3)
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:42 UTC
CWE
- CWE-409 - Improper handling of highly compressed data (data amplification)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.cisa.gov/news-events/ics-advisories/i… | government-resource |
| https://github.com/cisagov/Malcolm/security/advis… |
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CVE-2026-19670 (GCVE-0-2026-19670)
Vulnerability from nvd – Published: 2026-08-18 19:06 – Updated: 2026-08-18 19:47
VLAI
EPSS
VEX
Title
Incorrect Authorization in CISA Malcolm
Summary
Malcolm's nginx Lua role-based access control (RBAC) layer decides whether an authenticated user may reach a role-restricted path (e.g. /htadmin, /auth, /admin_login, /arkime/api/esadmin, NetBox, upload endpoints) by pattern-matching the raw, percent-encoded request URI. Nginx itself, however, selects which location block actually serves the request using the percent-decoded, normalized URI. Because the RBAC check never percent-decodes its input, an authenticated low-privilege user can request an admin-only path using percent-encoding (e.g. /%68tadmin.php) and have nginx route it to the restricted location while the Lua RBAC gate evaluating the un-decoded raw string finds no matching restriction and grants access.
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CNA · icscert (v2.0.3)
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:46 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.cisa.gov/news-events/ics-advisories/i… | government-resource |
| https://github.com/cisagov/Malcolm/security/advis… |
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CVE-2026-63177 (GCVE-0-2026-63177)
Vulnerability from nvd – Published: 2026-08-11 20:30 – Updated: 2026-08-12 22:12
VLAI
EPSS
VEX
Title
Malcolm Vulnerable to Authorization Bypass via URI Normalization Differential in Nginx Lua RBAC
Summary
Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, role-based access control enforced in the Nginx OpenResty Lua layer evaluates the raw, unnormalized `ngx.var.request_uri`, while Nginx itself routes requests using the normalized path. An authenticated low-privilege user can prepend a traversal segment (for example `/x/../upload/...`) so that Nginx routes the request to a restricted backend while the Lua role check fails to match any rule and falls open, granting access it should deny. Version 26.07.0 fixes the issue.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 22:07 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cisagov/Malcolm/security/advis… | x_refsource_CONFIRM |
| https://github.com/cisagov/Malcolm/releases/tag/v… | x_refsource_MISC |
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CVE-2026-63134 (GCVE-0-2026-63134)
Vulnerability from nvd – Published: 2026-08-11 20:29 – Updated: 2026-08-13 15:00
VLAI
EPSS
VEX
Title
Malcolm's Path Traversal in Archive Extraction Allows Arbitrary Directory Creation
Summary
Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, `safe-extract.py` protects file extraction with libarchive's secure flags, but creates directory entries with a raw `os.makedirs(os.path.join(dest, entry.pathname))` that has no traversal protection. An uploaded malicious archive containing a directory entry with a `../` sequence or an absolute path causes the filebeat processing container to create directories outside the intended extraction directory. Version 26.07.0 fixes the issue.
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 14:59 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cisagov/Malcolm/security/advis… | x_refsource_CONFIRM |
| https://github.com/cisagov/Malcolm/releases/tag/v… | x_refsource_MISC |
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CVE-2026-63133 (GCVE-0-2026-63133)
Vulnerability from nvd – Published: 2026-08-11 20:26 – Updated: 2026-08-12 13:01
VLAI
EPSS
VEX
Title
Malcolm has Uncontrolled Resource Consumption in Archive Extraction (Inode-Exhaustion DoS)
Summary
Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, `safe-extract.py` extracts uploaded archives with no limit on entry count, directory depth, total entries, or output size. A small malicious archive containing a large number of directory or file entries causes the filebeat processing container to create an unbounded number of filesystem objects, exhausting inodes or filesystem metadata and denying service to the processing pipeline and any service sharing the same mount. Version 26.07.0 fixes the issue.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 13:01 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cisagov/Malcolm/security/advis… | x_refsource_CONFIRM |
| https://github.com/cisagov/Malcolm/releases/tag/v… | x_refsource_MISC |
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CVE-2026-55676 (GCVE-0-2026-55676)
Vulnerability from nvd – Published: 2026-08-11 20:24 – Updated: 2026-08-12 22:13
VLAI
EPSS
VEX
Title
Malcolm vulnerable to RCE via unrestricted .php upload to the file-upload component
Summary
Malcolm is a network traffic analysis tool suite. The file-upload component (FilePond PHP backend) accepts uploads at `POST /server/php/submit.php` and stores them in a directory served by the same nginx and php-fpm instance. The allow-list that should restrict accepted file types is an empty array by default (`file-upload/php/config.php:16`), so the type check is a no-op and every extension is accepted. The filename sanitizer keeps the `.php` extension intact. Committed files land in `/var/www/upload/server/php/files` (`file-upload/php/config.php:7`), and the component's nginx routes any URL ending in `.php` to php-fpm. An authenticated `GET /server/php/files/<name>.php` then executes the uploaded code as `www-data`. Prior to version 26.06.1, in RBAC mode, the upload endpoint is reachable by the granular `ROLE_UPLOAD` role (`nginx/lua/nginx_auth_helpers.lua:71`), a role intended only for submitting capture files. As a result, a user holding the upload-only role runs arbitrary PHP as `www-data` inside the file-upload container. Version 26.06.1 fixes the issue.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 22:09 UTC
CWE
- CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cisagov/Malcolm/security/advis… | x_refsource_CONFIRM |
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CVE-2026-19671 (GCVE-0-2026-19671)
Vulnerability from cvelistv5 – Published: 2026-08-18 19:11 – Updated: 2026-08-18 19:45
VLAI
EPSS
VEX
Title
Improper handling of highly compressed data (data amplification) in CISA Malcolm
Summary
Malcolm's upload-processing pipeline (scripts/safe-extract.py) enforces entry-count, nesting-depth, and total-uncompressed-byte limits when extracting container archives (zip/tar/rar/7z via libarchive), but those limits are not applied when the uploaded file is a single-stream compressed format (.gz, .bz2, .xz, .lzma, .lz) that isn't a .tar.*-style archive. Any authenticated user permitted to upload PCAP/log files can upload a small, highly compressible file (e.g. a gzip bomb) that decompresses to an effectively unbounded size on disk, exhausting the shared Docker volume used by OpenSearch, Logstash, Arkime, and Zeek, and disrupting the platform for all users.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CNA · icscert (v2.0.3)
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:42 UTC
CWE
- CWE-409 - Improper handling of highly compressed data (data amplification)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.cisa.gov/news-events/ics-advisories/i… | government-resource |
| https://github.com/cisagov/Malcolm/security/advis… |
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CVE-2026-19670 (GCVE-0-2026-19670)
Vulnerability from cvelistv5 – Published: 2026-08-18 19:06 – Updated: 2026-08-18 19:47
VLAI
EPSS
VEX
Title
Incorrect Authorization in CISA Malcolm
Summary
Malcolm's nginx Lua role-based access control (RBAC) layer decides whether an authenticated user may reach a role-restricted path (e.g. /htadmin, /auth, /admin_login, /arkime/api/esadmin, NetBox, upload endpoints) by pattern-matching the raw, percent-encoded request URI. Nginx itself, however, selects which location block actually serves the request using the percent-decoded, normalized URI. Because the RBAC check never percent-decodes its input, an authenticated low-privilege user can request an admin-only path using percent-encoding (e.g. /%68tadmin.php) and have nginx route it to the restricted location while the Lua RBAC gate evaluating the un-decoded raw string finds no matching restriction and grants access.
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CNA · icscert (v2.0.3)
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:46 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.cisa.gov/news-events/ics-advisories/i… | government-resource |
| https://github.com/cisagov/Malcolm/security/advis… |
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CVE-2026-63177 (GCVE-0-2026-63177)
Vulnerability from cvelistv5 – Published: 2026-08-11 20:30 – Updated: 2026-08-12 22:12
VLAI
EPSS
VEX
Title
Malcolm Vulnerable to Authorization Bypass via URI Normalization Differential in Nginx Lua RBAC
Summary
Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, role-based access control enforced in the Nginx OpenResty Lua layer evaluates the raw, unnormalized `ngx.var.request_uri`, while Nginx itself routes requests using the normalized path. An authenticated low-privilege user can prepend a traversal segment (for example `/x/../upload/...`) so that Nginx routes the request to a restricted backend while the Lua role check fails to match any rule and falls open, granting access it should deny. Version 26.07.0 fixes the issue.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 22:07 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cisagov/Malcolm/security/advis… | x_refsource_CONFIRM |
| https://github.com/cisagov/Malcolm/releases/tag/v… | x_refsource_MISC |
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CVE-2026-63134 (GCVE-0-2026-63134)
Vulnerability from cvelistv5 – Published: 2026-08-11 20:29 – Updated: 2026-08-13 15:00
VLAI
EPSS
VEX
Title
Malcolm's Path Traversal in Archive Extraction Allows Arbitrary Directory Creation
Summary
Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, `safe-extract.py` protects file extraction with libarchive's secure flags, but creates directory entries with a raw `os.makedirs(os.path.join(dest, entry.pathname))` that has no traversal protection. An uploaded malicious archive containing a directory entry with a `../` sequence or an absolute path causes the filebeat processing container to create directories outside the intended extraction directory. Version 26.07.0 fixes the issue.
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 14:59 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cisagov/Malcolm/security/advis… | x_refsource_CONFIRM |
| https://github.com/cisagov/Malcolm/releases/tag/v… | x_refsource_MISC |
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CVE-2026-63133 (GCVE-0-2026-63133)
Vulnerability from cvelistv5 – Published: 2026-08-11 20:26 – Updated: 2026-08-12 13:01
VLAI
EPSS
VEX
Title
Malcolm has Uncontrolled Resource Consumption in Archive Extraction (Inode-Exhaustion DoS)
Summary
Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, `safe-extract.py` extracts uploaded archives with no limit on entry count, directory depth, total entries, or output size. A small malicious archive containing a large number of directory or file entries causes the filebeat processing container to create an unbounded number of filesystem objects, exhausting inodes or filesystem metadata and denying service to the processing pipeline and any service sharing the same mount. Version 26.07.0 fixes the issue.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 13:01 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cisagov/Malcolm/security/advis… | x_refsource_CONFIRM |
| https://github.com/cisagov/Malcolm/releases/tag/v… | x_refsource_MISC |
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CVE-2026-55676 (GCVE-0-2026-55676)
Vulnerability from cvelistv5 – Published: 2026-08-11 20:24 – Updated: 2026-08-12 22:13
VLAI
EPSS
VEX
Title
Malcolm vulnerable to RCE via unrestricted .php upload to the file-upload component
Summary
Malcolm is a network traffic analysis tool suite. The file-upload component (FilePond PHP backend) accepts uploads at `POST /server/php/submit.php` and stores them in a directory served by the same nginx and php-fpm instance. The allow-list that should restrict accepted file types is an empty array by default (`file-upload/php/config.php:16`), so the type check is a no-op and every extension is accepted. The filename sanitizer keeps the `.php` extension intact. Committed files land in `/var/www/upload/server/php/files` (`file-upload/php/config.php:7`), and the component's nginx routes any URL ending in `.php` to php-fpm. An authenticated `GET /server/php/files/<name>.php` then executes the uploaded code as `www-data`. Prior to version 26.06.1, in RBAC mode, the upload endpoint is reachable by the granular `ROLE_UPLOAD` role (`nginx/lua/nginx_auth_helpers.lua:71`), a role intended only for submitting capture files. As a result, a user holding the upload-only role runs arbitrary PHP as `www-data` inside the file-upload container. Version 26.06.1 fixes the issue.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 22:09 UTC
CWE
- CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cisagov/Malcolm/security/advis… | x_refsource_CONFIRM |
| https://github.com/cisagov/Malcolm/releases/tag/v… | x_refsource_MISC |
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