CVE-2026-39820
Vulnerability Summary
Timeline
Description
Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations.
CVSS Metrics
- v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Trends
Current EPSS score: 0.78%• Percentile: 54%
Techniques & Countermeasures
- CWE-770•Allocation of Resources Without Limits or Throttling
The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.
- CWE-606•Unchecked Input for Loop Condition
The product does not properly check inputs that are used for loop conditions, potentially leading to a denial of service or other consequences because of excessive looping.
Affected Systems
- chainguard•aactl
< 0.4.12-r50 | < 0.4.12-r51
- chainguard•act
< 0.2.88-r2
- chainguard•actions-runner-controller-fips
< 0.14.1-r2 | < 0.14.1-r1 | < 0
- chainguard•addon-resizer
< 0
- chainguard•addon-resizer-fips
< 0
- chainguard•age-fips
< 1.3.1-r7 | < 0
- chainguard•agentbeat
< 0
- chainguard•agentbeat-fips
< 0
- chainguard•amazon-cloudwatch-agent
< 1.300067.0-r3 | < 1.300067.0-r2
- chainguard•amazon-cloudwatch-agent-amazon-cloudwatch-agent-config-wizard
< 0
- chainguard•amazon-cloudwatch-agent-amazon-cloudwatch-agent-config-wizard-fips
< 0
- chainguard•amazon-cloudwatch-agent-config-downloader
< 0
- chainguard•amazon-cloudwatch-agent-config-downloader-fips
< 0
- chainguard•amazon-cloudwatch-agent-config-translator
< 0
- chainguard•amazon-cloudwatch-agent-config-translator-fips
< 0
- chainguard•amazon-cloudwatch-agent-operator
< 0
- chainguard•amazon-cloudwatch-agent-operator-fips
< 0
- chainguard•amazon-cloudwatch-agent-start-amazon-cloudwatch-agent
< 0
- chainguard•amazon-cloudwatch-agent-start-amazon-cloudwatch-agent-fips
< 0
- chainguard•amazon-ecs-agent-fips
< 0
- chainguard•amazon-ecs-cni-plugins-fips
< 2024.9.0_git20260306-r2 | < 0
- chainguard•amazon-eks-ami
< 0
- chainguard•amazon-eks-ami-fips
< 20260318-r3 | < 0
- chainguard•amazon-k8s-cni
< 1.21.1-r6 | < 0 | < 1.21.1-r7
- chainguard•amazon-k8s-cni-fips
< 0 | < 1.21.1-r6
- chainguard•amazon-k8s-cni-init
< 0
- chainguard•amazon-k8s-cni-init-fips
< 0
- chainguard•amazon-k8s-cni-init-fips-compat
< 0 | < 1.21.1-r6
- chainguard•amazon-ssm-agent
< 3.3.3270.0-r14 | < 0
- chainguard•amazon-ssm-agent-ecs-exec
< 0 | < 3.3.3270.0-r14
- chainguard•amazon-ssm-agent-ecs-exec-fips
< 3.3.3270.0-r15 | < 0
- chainguard•amazon-ssm-agent-fips
< 3.3.3270.0-r16 | < 0
- chainguard•amazon-vpc-cni-plugins-fips
< 0 | < 1.3_git20260307-r1
- chainguard•ansible-operator
< 1.42.2-r4 | < 1.42.2-r5
- chainguard•ansible-operator-fips
< 1.42.2-r5
- chainguard•apache-exporter
< 0
- chainguard•apko
< 0
- chainguard•apko-fips
< 0
- chainguard•apm-server-fips-8.19
< 0
- chainguard•apm-server-fips-9.1
< 9.1.10-r7
- chainguard•apm-server-fips-9.2
< 0
- chainguard•apm-server-fips-9.3
< 0
- chainguard•apm-server-fips-9.4
< 0
- chainguard•argo-cd-3.3-compat
< 3.3.9-r2
- chainguard•argo-cd-fips-3.0
< 3.0.23-r7
- chainguard•argo-cd-fips-3.0-compat
< 3.0.23-r7
- chainguard•argo-cd-fips-3.1
< 3.1.16-r1
- chainguard•argo-cd-fips-3.1-compat
< 3.1.16-r1
- chainguard•argo-cd-fips-3.2
< 3.2.11-r2 | < 3.2.11-r1
- chainguard•argo-cd-fips-3.2-compat
< 3.2.11-r1
Showing first 50 affected entries in server-rendered view.
References (105)
- https://go.dev/issue/78566
- https://go.dev/cl/759940
- https://groups.google.com/g/golang-announce/c/qcCIEXso47M
- https://pkg.go.dev/vuln/GO-2026-4986
- https://access.redhat.com/security/cve/CVE-2026-39820
- https://bugzilla.redhat.com/show_bug.cgi?id=2467820
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39820.json
- https://access.redhat.com/errata/RHSA-2026:33120
- https://access.redhat.com/errata/RHSA-2026:33123
- https://access.redhat.com/errata/RHSA-2026:33142
- https://access.redhat.com/errata/RHSA-2026:33150
- https://access.redhat.com/errata/RHSA-2026:34364
- https://access.redhat.com/errata/RHSA-2026:36625
- https://access.redhat.com/errata/RHSA-2026:36319
- https://access.redhat.com/errata/RHSA-2026:33574
- https://access.redhat.com/errata/RHSA-2026:36754
- https://access.redhat.com/errata/RHSA-2026:36797
- https://access.redhat.com/errata/RHSA-2026:23262
- https://access.redhat.com/errata/RHSA-2026:23264
- https://access.redhat.com/errata/RHSA-2026:41031
- https://access.redhat.com/errata/RHSA-2026:41066
- https://access.redhat.com/errata/RHSA-2026:40262
- https://access.redhat.com/errata/RHSA-2026:41928
- https://access.redhat.com/errata/RHSA-2026:42644
- https://access.redhat.com/errata/RHSA-2026:42146
- https://access.redhat.com/errata/RHSA-2026:43038
- https://access.redhat.com/errata/RHSA-2026:42796
- https://access.redhat.com/errata/RHSA-2026:50843
- https://access.redhat.com/errata/RHSA-2026:47952
- https://access.redhat.com/errata/RHSA-2026:51033
- https://access.redhat.com/errata/RHSA-2026:43692
- https://access.redhat.com/errata/RHSA-2026:50300
- https://access.redhat.com/errata/RHSA-2026:54287
- https://access.redhat.com/errata/RHSA-2026:54285
- https://access.redhat.com/errata/RHSA-2026:54283
- https://access.redhat.com/errata/RHSA-2026:50205
- https://access.redhat.com/errata/RHSA-2026:43052
- https://access.redhat.com/errata/RHSA-2026:54284
- https://access.redhat.com/errata/RHSA-2026:54286
- https://access.redhat.com/errata/RHSA-2026:54274
- https://security-tracker.debian.org/tracker/CVE-2026-39820
- https://access.redhat.com/errata/RHSA-2026:54531
- https://access.redhat.com/errata/RHSA-2026:56340
- https://access.redhat.com/errata/RHSA-2026:54583
- https://access.redhat.com/errata/RHSA-2026:54602
- https://access.redhat.com/errata/RHSA-2026:54883
- https://access.redhat.com/security/updates/classification/#important
- https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_54883.json
- https://www.cve.org/CVERecord?id=CVE-2026-39820
- https://nvd.nist.gov/vuln/detail/CVE-2026-39820
- https://access.redhat.com/errata/RHSA-2026:54552
- https://access.redhat.com/errata/RHSA-2026:54555
- https://access.redhat.com/errata/RHSA-2026:57194
- https://access.redhat.com/errata/RHSA-2026:57845
- https://access.redhat.com/errata/RHSA-2026:57914
- https://access.redhat.com/errata/RHSA-2026:49702
- https://access.redhat.com/errata/RHSA-2026:22120
- https://access.redhat.com/errata/RHSA-2026:22112
- https://access.redhat.com/errata/RHSA-2026:57649
- https://access.redhat.com/errata/RHSA-2026:49712
- https://access.redhat.com/errata/RHSA-2026:22121
- https://access.redhat.com/errata/RHSA-2026:59467
- https://access.redhat.com/errata/RHSA-2026:56789
- https://access.redhat.com/errata/RHSA-2026:57401
- https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_57401.json
- https://access.redhat.com/errata/RHSA-2026:56852
- https://access.redhat.com/errata/RHSA-2026:57482
- https://access.redhat.com/errata/RHSA-2026:56854
- https://access.redhat.com/errata/RHSA-2026:57487
- https://access.redhat.com/errata/RHSA-2026:60520
- https://access.redhat.com/errata/RHSA-2026:61253
- https://access.redhat.com/errata/RHSA-2026:62407
- https://access.redhat.com/errata/RHSA-2026:62406
- https://access.redhat.com/errata/RHSA-2026:62260
- https://access.redhat.com/errata/RHSA-2026:63022
- https://access.redhat.com/errata/RHSA-2026:62754
- https://access.redhat.com/errata/RHSA-2026:62753
- https://access.redhat.com/errata/RHSA-2026:62803
- https://access.redhat.com/errata/RHSA-2026:59833
- https://access.redhat.com/errata/RHSA-2026:59830
- https://access.redhat.com/errata/RHSA-2026:60018
- https://access.redhat.com/errata/RHSA-2026:60023
- https://pkg.go.dev
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39820.json
- https://access.redhat.com/errata/RHSA-2026:65335
- https://access.redhat.com/errata/RHSA-2026:65534
- https://access.redhat.com/errata/RHSA-2026:65116
- https://access.redhat.com/errata/RHSA-2026:65336
- https://access.redhat.com/errata/RHSA-2026:65886
- https://access.redhat.com/errata/RHSA-2026:65117
- https://access.redhat.com/errata/RHSA-2026:65153
- https://access.redhat.com/errata/RHSA-2026:66327
- https://access.redhat.com/errata/RHSA-2026:65895
- https://access.redhat.com/errata/RHSA-2026:66016
- https://access.redhat.com/errata/RHSA-2026:51112
- https://access.redhat.com/errata/RHSA-2026:66022
- https://access.redhat.com/errata/RHSA-2026:50319
- https://access.redhat.com/errata/RHSA-2026:50336
- https://access.redhat.com/errata/RHSA-2026:67517
- https://access.redhat.com/errata/RHSA-2026:68334
- https://access.redhat.com/errata/RHSA-2026:65838
- https://access.redhat.com/errata/RHSA-2026:67974
- https://access.redhat.com/errata/RHSA-2026:68504
- https://access.redhat.com/errata/RHSA-2026:68527
- https://access.redhat.com/errata/RHSA-2026:67975