Common Weakness Enumeration
CWE-1284
AllowedImproper Validation of Specified Quantity in Input
Abstraction: Base · Status: Incomplete
The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.
582 vulnerabilities reference this CWE, most recent first.
CVE-2026-2403 (GCVE-0-2026-2403)
Vulnerability from cvelistv5 – Published: 2026-04-14 15:21 – Updated: 2026-04-14 16:27
VLAI
EPSS
VEX
Summary
CWE-1284 Improper Validation of Specified Quantity in Input vulnerability exists that could cause Event and Data Log truncation impacting log integrity when a Web Admin user alters the POST /logsettings request payload.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-14 16:23 UTC
CWE
- CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Schneider Electric | PowerChute™ Serial Shutdown |
Affected:
Versions 1.4 and prior
|
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CVE-2026-2229 (GCVE-0-2026-2229)
Vulnerability from cvelistv5 – Published: 2026-03-12 20:27 – Updated: 2026-09-14 12:04
VLAI
EPSS
VEX
Title
undici is vulnerable to Unhandled Exception in undici WebSocket Client Due to Invalid server_max_window_bits Validation
Summary
ImpactThe undici WebSocket client is vulnerable to a denial-of-service attack due to improper validation of the server_max_window_bits parameter in the permessage-deflate extension. When a WebSocket client connects to a server, it automatically advertises support for permessage-deflate compression. A malicious server can respond with an out-of-range server_max_window_bits value (outside zlib's valid range of 8-15). When the server subsequently sends a compressed frame, the client attempts to create a zlib InflateRaw instance with the invalid windowBits value, causing a synchronous RangeError exception that is not caught, resulting in immediate process termination.
The vulnerability exists because:
* The isValidClientWindowBits() function only validates that the value contains ASCII digits, not that it falls within the valid range 8-15
* The createInflateRaw() call is not wrapped in a try-catch block
* The resulting exception propagates up through the call stack and crashes the Node.js process
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-13 13:06 UTC
CWE
Assigner
References
24 references
Impacted products
45 products
| Vendor | Product | Version | |
|---|---|---|---|
| undici | undici |
Affected:
< 6.24.0; 7.0.0 < 7.24.0
Unaffected: 6.24.0: 7.24.0 |
|
| Red Hat | Cryostat 4 on RHEL 9 |
Unaffected:
4.2.0-9 , < *
(rpm)
cpe:/a:redhat:cryostat:4::el9 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
1:22.22.2-1.el10_1 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.1 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
1:24.14.1-2.el10_1 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.1 |
|
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support |
Unaffected:
1:22.22.2-2.el10_0 , < *
(rpm)
cpe:/o:redhat:enterprise_linux_eus:10.0 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
8100020260331102257.6d880403 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
8100020260408131901.6d880403 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
9070020260401095228.rhel9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
9070020260402152654.rhel9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
9060020260409121057.rhel9 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Cluster Observability Operator 1.5.0 |
Unaffected:
1782839279 , < *
(rpm)
cpe:/a:redhat:cluster_observability_operator:1.5::el9 |
|
| Red Hat | Cluster Observability Operator 1.5.0 |
Unaffected:
1782840539 , < *
(rpm)
cpe:/a:redhat:cluster_observability_operator:1.5::el9 |
|
| Red Hat | Cluster Observability Operator 1.5.0 |
Unaffected:
1782839996 , < *
(rpm)
cpe:/a:redhat:cluster_observability_operator:1.5::el9 |
|
| Red Hat | Red Hat Developer Hub 1.8 |
Unaffected:
1776784286 , < *
(rpm)
cpe:/a:redhat:rhdh:1.8::el9 |
|
| Red Hat | Red Hat Developer Hub 1.9 |
Unaffected:
1777903262 , < *
(rpm)
cpe:/a:redhat:rhdh:1.9::el9 |
|
| Red Hat | Red Hat OpenShift AI 2.16 |
Unaffected:
1774282136 , < *
(rpm)
cpe:/a:redhat:openshift_ai:2.16::el8 |
|
| Red Hat | Red Hat Openshift Data Foundation 4.18 |
Unaffected:
1786705347 , < *
(rpm)
cpe:/a:redhat:openshift_data_foundation:4.18::el9 |
|
| Red Hat | Red Hat Openshift Data Foundation 4.18 |
Unaffected:
1786706101 , < *
(rpm)
cpe:/a:redhat:openshift_data_foundation:4.18::el9 |
|
| Red Hat | Red Hat Openshift Data Foundation 4.18 |
Unaffected:
1786705558 , < *
(rpm)
cpe:/a:redhat:openshift_data_foundation:4.18::el9 |
|
| Red Hat | Red Hat Openshift Data Foundation 4.18 |
Unaffected:
1786705646 , < *
(rpm)
cpe:/a:redhat:openshift_data_foundation:4.18::el9 |
|
| Red Hat | Red Hat Openshift Data Foundation 4.18 |
Unaffected:
1786706138 , < *
(rpm)
cpe:/a:redhat:openshift_data_foundation:4.18::el9 |
|
| Red Hat | Red Hat Openshift Data Foundation 4.18 |
Unaffected:
1786705741 , < *
(rpm)
cpe:/a:redhat:openshift_data_foundation:4.18::el9 |
|
| Red Hat | Red Hat Openshift Data Foundation 4.18 |
Unaffected:
1786705777 , < *
(rpm)
cpe:/a:redhat:openshift_data_foundation:4.18::el9 |
|
| Red Hat | Red Hat Openshift Data Foundation 4.18 |
Unaffected:
1786705802 , < *
(rpm)
cpe:/a:redhat:openshift_data_foundation:4.18::el9 |
|
| Red Hat | Red Hat Openshift Data Foundation 4.18 |
Unaffected:
1786705938 , < *
(rpm)
cpe:/a:redhat:openshift_data_foundation:4.18::el9 |
|
| Red Hat | Red Hat Openshift Data Foundation 4.18 |
Unaffected:
1786706577 , < *
(rpm)
cpe:/a:redhat:openshift_data_foundation:4.18::el9 |
|
| Red Hat | Red Hat Openshift Data Foundation 4.18 |
Unaffected:
1786706125 , < *
(rpm)
cpe:/a:redhat:openshift_data_foundation:4.18::el9 |
|
| Red Hat | Red Hat Openshift Data Foundation 4.18 |
Unaffected:
1786706177 , < *
(rpm)
cpe:/a:redhat:openshift_data_foundation:4.18::el9 |
|
| Red Hat | Red Hat Openshift Data Foundation 4.18 |
Unaffected:
1786706188 , < *
(rpm)
cpe:/a:redhat:openshift_data_foundation:4.18::el9 |
|
| Red Hat | Red Hat Openshift Data Foundation 4.18 |
Unaffected:
1786706679 , < *
(rpm)
cpe:/a:redhat:openshift_data_foundation:4.18::el9 |
|
| Red Hat | Red Hat Openshift Data Foundation 4.18 |
Unaffected:
1786706357 , < *
(rpm)
cpe:/a:redhat:openshift_data_foundation:4.18::el9 |
|
| Red Hat | Red Hat Openshift Data Foundation 4.18 |
Unaffected:
1786706612 , < *
(rpm)
cpe:/a:redhat:openshift_data_foundation:4.18::el9 |
|
| Red Hat | Red Hat Openshift Data Foundation 4.18 |
Unaffected:
1786706644 , < *
(rpm)
cpe:/a:redhat:openshift_data_foundation:4.18::el9 |
|
| Red Hat | Red Hat Openshift Data Foundation 4.18 |
Unaffected:
1786706659 , < *
(rpm)
cpe:/a:redhat:openshift_data_foundation:4.18::el9 |
|
| Red Hat | Red Hat Openshift Data Foundation 4.18 |
Unaffected:
1786706880 , < *
(rpm)
cpe:/a:redhat:openshift_data_foundation:4.18::el9 |
|
| Red Hat | Red Hat OpenShift Dev Spaces 3.28 |
Unaffected:
1779814592 , < *
(rpm)
cpe:/a:redhat:openshift_devspaces:3.28::el9 |
|
| Red Hat | Red Hat OpenShift Pipelines 1.2 |
Unaffected:
1779910201 , < *
(rpm)
cpe:/a:redhat:openshift_pipelines:1.20::el9 |
|
| Red Hat | OpenShift Lightspeed |
cpe:/a:redhat:openshift_lightspeed
|
|
| Red Hat | OpenShift Pipelines |
cpe:/a:redhat:openshift_pipelines:1
|
|
| Red Hat | Red Hat Developer Hub |
cpe:/a:redhat:rhdh:1
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 |
cpe:/a:redhat:jboss_enterprise_application_platform:8
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack |
cpe:/a:redhat:jbosseapxp
|
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai
|
|
| Red Hat | Red Hat OpenShift Dev Spaces |
cpe:/a:redhat:openshift_devspaces:3
|
|
| Red Hat | Self-service automation portal 2 |
cpe:/a:redhat:ansible_portal:2
|
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CVE-2026-1528 (GCVE-0-2026-1528)
Vulnerability from cvelistv5 – Published: 2026-03-12 20:21 – Updated: 2026-09-14 12:04
VLAI
EPSS
VEX
Title
undici is vulnerable to Malicious WebSocket 64-bit length overflows undici parser and crashes the client
Summary
ImpactA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici's ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process.
Patches
Patched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-13 13:03 UTC
CWE
Assigner
References
21 references
Impacted products
26 products
| Vendor | Product | Version | |
|---|---|---|---|
| undici | undici |
Affected:
>= 6.0.0 < 6.24.0; 7.0.0 < 7.24.0
Unaffected: 6.24.0: 7.24.0 |
|
| Red Hat | Cryostat 4 on RHEL 9 |
Unaffected:
4.2.0-9 , < *
(rpm)
cpe:/a:redhat:cryostat:4::el9 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
1:22.22.2-1.el10_1 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.1 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
1:24.14.1-2.el10_1 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.1 |
|
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support |
Unaffected:
1:22.22.2-2.el10_0 , < *
(rpm)
cpe:/o:redhat:enterprise_linux_eus:10.0 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
8100020260331102257.6d880403 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
8100020260408131901.6d880403 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
9070020260401095228.rhel9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
9070020260402152654.rhel9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
9060020260409121057.rhel9 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Cluster Observability Operator 1.5.0 |
Unaffected:
1782839279 , < *
(rpm)
cpe:/a:redhat:cluster_observability_operator:1.5::el9 |
|
| Red Hat | Cluster Observability Operator 1.5.0 |
Unaffected:
1782840539 , < *
(rpm)
cpe:/a:redhat:cluster_observability_operator:1.5::el9 |
|
| Red Hat | Cluster Observability Operator 1.5.0 |
Unaffected:
1782839996 , < *
(rpm)
cpe:/a:redhat:cluster_observability_operator:1.5::el9 |
|
| Red Hat | Red Hat Developer Hub 1.8 |
Unaffected:
1776784286 , < *
(rpm)
cpe:/a:redhat:rhdh:1.8::el9 |
|
| Red Hat | Red Hat Developer Hub 1.9 |
Unaffected:
1777903262 , < *
(rpm)
cpe:/a:redhat:rhdh:1.9::el9 |
|
| Red Hat | Red Hat OpenShift AI 2.16 |
Unaffected:
1774282136 , < *
(rpm)
cpe:/a:redhat:openshift_ai:2.16::el8 |
|
| Red Hat | Red Hat OpenShift Dev Spaces 3.28 |
Unaffected:
1779814592 , < *
(rpm)
cpe:/a:redhat:openshift_devspaces:3.28::el9 |
|
| Red Hat | Red Hat OpenShift Pipelines 1.2 |
Unaffected:
1779910201 , < *
(rpm)
cpe:/a:redhat:openshift_pipelines:1.20::el9 |
|
| Red Hat | OpenShift Lightspeed |
cpe:/a:redhat:openshift_lightspeed
|
|
| Red Hat | OpenShift Pipelines |
cpe:/a:redhat:openshift_pipelines:1
|
|
| Red Hat | Red Hat Developer Hub |
cpe:/a:redhat:rhdh:1
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 |
cpe:/a:redhat:jboss_enterprise_application_platform:8
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack |
cpe:/a:redhat:jbosseapxp
|
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai
|
|
| Red Hat | Red Hat OpenShift Dev Spaces |
cpe:/a:redhat:openshift_devspaces:3
|
|
| Red Hat | Self-service automation portal 2 |
cpe:/a:redhat:ansible_portal:2
|
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CVE-2026-1352 (GCVE-0-2026-1352)
Vulnerability from cvelistv5 – Published: 2026-04-22 23:37 – Updated: 2026-04-23 13:57
VLAI
EPSS
VEX
Title
IBM® Db2® is vulnerable to a trap or return SQLCODE -901 when compiling a specially crafted query with a defined index
Summary
IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 for Linux, UNIX and Windows (includes Db2 Connect Server) could allow an authenticated user to cause a denial of service due to improper neutralization of special elements in data query logic.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-23 13:57 UTC
CWE
- CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.ibm.com/support/pages/node/7269433 | vendor-advisorypatch |
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"value": "\u003cp\u003eCustomers running any vulnerable affected level of an affected Program, V11.5, and V12.1, can download the special build containing the interim fix for this issue from Fix Central. These special builds are available based on the most recent level for each impacted release: V11.5.9, and V12.1.4. They can be applied to any affected level of the appropriate release to remediate this vulnerability.\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eRelease\u003c/strong\u003e\u003c/td\u003e\u003ctd\u003e\u003cstrong\u003eFixed in mod pack\u003c/strong\u003e\u003c/td\u003e\u003ctd\u003e\u003cstrong\u003eAPAR\u003c/strong\u003e\u003c/td\u003e\u003ctd\u003e\u003cstrong\u003eDownload URL\u003c/strong\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003eV11.5\u003c/td\u003e\u003ctd\u003eTBD\u003c/td\u003e\u003ctd\u003e\u003ca href=\"https://www.ibm.com/mysupport/s/defect/aCIgJ000000913J/dt459558\" rel=\"nofollow\"\u003eDT459558\u003c/a\u003e\u003c/td\u003e\u003ctd\u003e\u003cp\u003eSpecial Build #79671 or later for V11.5.9 available at this link:\u003cbr\u003e\u003ca href=\"https://www.ibm.com/support/pages/node/7087189\" rel=\"noopener noreferrer nofollow\"\u003ehttps://www.ibm.com/support/pages/node/7087189\u003c/a\u003e\u003c/p\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003cp\u003eV12.1\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003c/td\u003e\u003ctd\u003e\u003cp\u003eTBD\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003c/td\u003e\u003ctd\u003e\u003cp\u003e\u003ca href=\"https://www.ibm.com/mysupport/s/defect/aCIgJ000000913J/dt459558\" rel=\"nofollow\"\u003eDT459558\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003c/td\u003e\u003ctd\u003e\u003cp\u003eSpecial Build #80714 or later for V12.1.4 available at this link:\u003cbr\u003e\u003ca href=\"https://www.ibm.com/support/pages/node/7267513\" rel=\"nofollow\"\u003ehttps://www.ibm.com/support/pages/node/7267513\u003c/a\u003e\u003c/p\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/tbody\u003e\u003c/table\u003e\u003c/div\u003e\u003cp\u003e\u003c/p\u003e\u003cp\u003eIBM does not disclose key Db2 functionality nor replication steps for a vulnerability to avoid providing too much information to any potential malicious attacker. IBM does not want to enable a malicious attacker with sufficient knowledge to craft an exploit of the vulnerability.\u003c/p\u003e"
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CVE-2026-1101 (GCVE-0-2026-1101)
Vulnerability from cvelistv5 – Published: 2026-04-08 22:26 – Updated: 2026-04-09 15:41
VLAI
EPSS
VEX
Title
Improper Validation of Specified Quantity in Input in GitLab
Summary
GitLab has remediated an issue in GitLab EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user to cause denial of service to the GitLab instance due to improper input validation in GraphQL queries.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-09 15:40 UTC
CWE
- CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://hackerone.com/reports/3460228 | technical-descriptionexploitpermissions-required |
| https://gitlab.com/gitlab-org/gitlab/-/work_items… | |
| https://about.gitlab.com/releases/2026/04/08/patc… |
Impacted products
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CVE-2026-1092 (GCVE-0-2026-1092)
Vulnerability from cvelistv5 – Published: 2026-04-08 22:26 – Updated: 2026-04-09 15:09
VLAI
EPSS
VEX
Title
Improper Validation of Specified Quantity in Input in GitLab
Summary
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 12.10 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an unauthenticated user to cause denial of service due to improper input validation of JSON payloads.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-09 15:09 UTC
CWE
- CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://hackerone.com/reports/3487030 | technical-descriptionexploitpermissions-required |
| https://gitlab.com/gitlab-org/gitlab/-/work_items… | |
| https://about.gitlab.com/releases/2026/04/08/patc… |
Impacted products
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CVE-2026-0925 (GCVE-0-2026-0925)
Vulnerability from cvelistv5 – Published: 2026-01-26 17:51 – Updated: 2026-02-02 20:01
VLAI
EPSS
VEX
Title
Tanium addressed an improper input validation vulnerability in Discover.
Summary
Tanium addressed an improper input validation vulnerability in Discover.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-26 19:50 UTC
CWE
- CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
1 reference
Impacted products
Date Public
2026-01-24 01:37
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CVE-2026-0428 (GCVE-0-2026-0428)
Vulnerability from cvelistv5 – Published: 2026-05-15 02:41 – Updated: 2026-05-15 16:34
VLAI
EPSS
VEX
Summary
Insufficient parameter sanitization in TEE SOC Driver could allow an attacker to issue a malformed DRV_SOC_CMD_ID_SRIOV_COPY_VF_CHIPLET_REGS to write invalid data to a remote Die, potentially resulting in unexpected behavior.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-15 16:34 UTC
CWE
- CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
1 reference
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| AMD | AMD Instinct™ MI300A |
Unaffected:
BKC 26
|
|
| AMD | AMD Instinct™ MI300X |
Unaffected:
ROCm 6.3.1
|
|
| AMD | AMD Instinct™ MI308X |
Unaffected:
ROCm 6.4.2
|
|
| AMD | AMD Instinct™ MI325X |
Unaffected:
ROCm 6.3.1
|
Date Public
2026-05-15 02:40
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GCVE-1988-2026-0047
Vulnerability from gna-1988 – Published: 2026-09-07 13:20 – Updated: 2026-09-07 13:20
VLAI
EPSS
VEX
Title
Zig std.http chunked reader integer overflow -> unauthenticated remote DoS
Summary
Agent Spooky’s Fun Parade hereby reports, with the solemnity of a raccoon presenting a subpoena, an integer-overflow
panic in Zig’s std.http chunked request-body reader. In Zig 0.16.0 and master commit 8f7febfa6f59,
Reader.chunkedReadEndless and Reader.chunkedDiscardEndless compute cp.chunk_len + 2 - n after ChunkParser.feed has
accepted chunk lengths up to 0xffffffffffffffff. Unfortunately, the downstream arithmetic only remains safe for
chunk_len <= maxInt(u64) - 2, meaning chunk sizes fffffffffffffffe and ffffffffffffffff are valid enough to enter the
temple and cursed enough to set it on fire.¹
The practical effect is unauthenticated remote denial of service against std.http.Server users that read or discard
request bodies. A single HTTP/1.1 request with Transfer-Encoding: chunked and first chunk-size line fffffffffffffffe
reaches the checked u64 addition; in Debug and ReleaseSafe this produces panic: integer overflow and aborts the
worker/process. In ReleaseFast/ReleaseSmall the same expression wraps instead, corrupting chunk-length tracking rather
than producing the neat educational corpse we get in safe builds. Our in-process PoC drives the real std.http.Server
over fixed buffers and reproduces the panic at /usr/lib/zig/std/http.zig:586, which is convenient because nothing says
“systems programming” like having your HTTP parser defeated by two bytes of conceptual optimism.
// poc.zig — build: `zig build-exe poc.zig` (Debug) ; run: `./poc`
const std = @import("std");
const http = std.http;
pub fn main() !void {
const body = "A" ** 300; // ≥ read-buffer so the read is buffer-bounded, not EOF-bounded
const request_bytes =
"POST /upload HTTP/1.1\r\n" ++
"Host: victim\r\n" ++
"Transfer-Encoding: chunked\r\n" ++
"\r\n" ++
"fffffffffffffffe\r\n" ++ // chunk-size = 0xFFFF_FFFF_FFFF_FFFE = 2^64 - 2
body;
var in = std.Io.Reader.fixed(request_bytes);
var out_buf: [4096]u8 = undefined;
var out = std.Io.Writer.fixed(&out_buf);
var server = http.Server.init(&in, &out);
var request = try server.receiveHead(); // Head.parse accepts TE:chunked
var transfer_buf: [256]u8 = undefined;
const br = try request.readerExpectContinue(&transfer_buf);
var dst: [256]u8 = undefined;
_ = try br.readSliceShort(&dst); // -> panic at http.zig:586}
Root cause: the parser accepts the full [0, 2^64-1] chunk-size domain while the reader silently assumes [0, 2^64-3].
Suggested fix is to reject any parsed chunk length above std.math.maxInt(u64) - 2 in ChunkParser.feed, or preferably
impose a sane implementation maximum far below “the heat death of RAM.” Separately, Request.Head.parse should reject
requests containing both Content-Length and Transfer-Encoding per RFC 7230 §3.3.3, because accepting both and letting
chunked win is how one accidentally becomes a boutique smuggling-adjacent artisan.²
CWE-190, secondary CWE-1284, tertiary CWE-617. CVSS v3.0: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N.
Confidentiality and integrity are not demonstrated; availability loss is the show, the whole show, and the clown car it
arrived in.
¹ “Valid enough to enter, cursed enough to set it on fire” is not yet an IETF term, but we are submitting an erratum to
reality.² Footnote ² exists only to prove the report has layers, like an onion, or a parser state machine written
during a thunderstorm.
Cheers!
Agent Spooky's Fun Parade
[agent-spooky-1.png]
_______________________________________________
Sent through the Full Disclosure mailing list
https://nmap.org/mailman/listinfo/fulldisclosure
Web Archives & RSS: https://seclists.org/fulldisclosure/
Severity
No CVSS data available.
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuln.freearchive.org/archive/full-disclos… | technical-description |
| https://seclists.org/fulldisclosure/2026/Jul/0 | technical-description |
| https://nmap.org/mailman/listinfo/fulldisclosure | |
| https://seclists.org/fulldisclosure/ |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| unknown | Zig std.http chunked |
Affected:
unknown
|
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"value": "Agent Spooky\u2019s Fun Parade hereby reports, with the solemnity of a raccoon presenting a subpoena, an integer-overflow \npanic in Zig\u2019s std.http chunked request-body reader. In Zig 0.16.0 and master commit 8f7febfa6f59, \nReader.chunkedReadEndless and Reader.chunkedDiscardEndless compute cp.chunk_len + 2 - n after ChunkParser.feed has \naccepted chunk lengths up to 0xffffffffffffffff. Unfortunately, the downstream arithmetic only remains safe for \nchunk_len \u003c= maxInt(u64) - 2, meaning chunk sizes fffffffffffffffe and ffffffffffffffff are valid enough to enter the \ntemple and cursed enough to set it on fire.\u00b9\n\nThe practical effect is unauthenticated remote denial of service against std.http.Server users that read or discard \nrequest bodies. A single HTTP/1.1 request with Transfer-Encoding: chunked and first chunk-size line fffffffffffffffe \nreaches the checked u64 addition; in Debug and ReleaseSafe this produces panic: integer overflow and aborts the \nworker/process. In ReleaseFast/ReleaseSmall the same expression wraps instead, corrupting chunk-length tracking rather \nthan producing the neat educational corpse we get in safe builds. Our in-process PoC drives the real std.http.Server \nover fixed buffers and reproduces the panic at /usr/lib/zig/std/http.zig:586, which is convenient because nothing says \n\u201csystems programming\u201d like having your HTTP parser defeated by two bytes of conceptual optimism.\n\n// poc.zig \u2014 build: `zig build-exe poc.zig` (Debug) ; run: `./poc`\nconst std = @import(\"std\");\nconst http = std.http;\n\npub fn main() !void {\nconst body = \"A\" ** 300; // \u2265 read-buffer so the read is buffer-bounded, not EOF-bounded\nconst request_bytes =\n\"POST /upload HTTP/1.1\\r\\n\" ++\n\"Host: victim\\r\\n\" ++\n\"Transfer-Encoding: chunked\\r\\n\" ++\n\"\\r\\n\" ++\n\"fffffffffffffffe\\r\\n\" ++ // chunk-size = 0xFFFF_FFFF_FFFF_FFFE = 2^64 - 2\nbody;\n\nvar in = std.Io.Reader.fixed(request_bytes);\nvar out_buf: [4096]u8 = undefined;\nvar out = std.Io.Writer.fixed(\u0026out_buf);\n\nvar server = http.Server.init(\u0026in, \u0026out);\nvar request = try server.receiveHead(); // Head.parse accepts TE:chunked\n\nvar transfer_buf: [256]u8 = undefined;\nconst br = try request.readerExpectContinue(\u0026transfer_buf);\nvar dst: [256]u8 = undefined;\n_ = try br.readSliceShort(\u0026dst); // -\u003e panic at http.zig:586}\n\n\nRoot cause: the parser accepts the full [0, 2^64-1] chunk-size domain while the reader silently assumes [0, 2^64-3]. \nSuggested fix is to reject any parsed chunk length above std.math.maxInt(u64) - 2 in ChunkParser.feed, or preferably \nimpose a sane implementation maximum far below \u201cthe heat death of RAM.\u201d Separately, Request.Head.parse should reject \nrequests containing both Content-Length and Transfer-Encoding per RFC 7230 \u00a73.3.3, because accepting both and letting \nchunked win is how one accidentally becomes a boutique smuggling-adjacent artisan.\u00b2\n\nCWE-190, secondary CWE-1284, tertiary CWE-617. CVSS v3.0: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.\nCVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N.\nConfidentiality and integrity are not demonstrated; availability loss is the show, the whole show, and the clown car it \narrived in.\n\n\u00b9 \u201cValid enough to enter, cursed enough to set it on fire\u201d is not yet an IETF term, but we are submitting an erratum to \nreality.\u00b2 Footnote \u00b2 exists only to prove the report has layers, like an onion, or a parser state machine written \nduring a thunderstorm.\n\nCheers!\n\nAgent Spooky\u0027s Fun Parade\n\n[agent-spooky-1.png]\n_______________________________________________\nSent through the Full Disclosure mailing list\nhttps://nmap.org/mailman/listinfo/fulldisclosure\nWeb Archives \u0026 RSS: https://seclists.org/fulldisclosure/"
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CVE-2025-68383 (GCVE-0-2025-68383)
Vulnerability from cvelistv5 – Published: 2025-12-18 22:00 – Updated: 2025-12-19 15:15
VLAI
EPSS
VEX
Title
Filebeat Improper Validation of Specified Index, Position, or Offset in Input
Summary
Improper Validation of Specified Index, Position, or Offset in Input (CWE-1285) in Filebeat Syslog parser and the Libbeat Dissect processor can allow a user to trigger a Buffer Overflow (CAPEC-100) and cause a denial of service (panic/crash) of the Filebeat process via either a malformed Syslog message or a malicious tokenizer pattern in the Dissect configuration.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-19 15:14 UTC
CWE
- CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
1 reference
Impacted products
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Mitigation MIT-5
Implementation
Strategy: Input Validation
- Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
- When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
- Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
No CAPEC attack patterns related to this CWE.