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Fencer Vulns
medium 4.3

CVE-2026-83530 json

Uncontrolled Memory Allocation in cel-go

published 2026-09-09 1 mo ago modified 2026-09-23 46 d ago also EUVD-2026-75041

cvss
4.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 5%
public exploits
0
none known

Summary

A user could provide an expression whose string length is longer than the ParserExpressionSizeLimit() configured on the CEL environment, and a memory allocation would occur proportional to the size of the input before the limit would be checked / enforced.

Patch / fix

  • Google cel-go 0.29.0
  • golang-cel-cel-go Debian 14 0.32.0+ds-1
  • golang-github-google-cel-go Debian 14 0.30.0+ds-1

debian advisories DEBIAN-CVE-2026-83530

  • grafana openSUSE Tumbleweed 12.4.11-1.1

opensuse advisories openSUSE-SU-2026:11920-1

  • cert-manager Azure Linux 3.0 1.12.15-14
  • cloud-provider-kubevirt Azure Linux 3.0 0.5.1-9
  • kube-vip-cloud-provider Azure Linux 3.0 0.0.10-10
  • kubernetes Azure Linux 3.0 1.30.10-32
  • prometheus-adapter Azure Linux 3.0 0.12.0-12
  • telegraf Azure Linux 3.0 1.31.0-33

azure linux advisories AZL-100914AZL-100917AZL-100935AZL-100938AZL-100944AZL-100950

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-83530 updated cvss 5.3

github.com/cel-expr/cel-go: cel-go: Denial of Service via uncontrolled memory allocation

  • Red Hat OpenShift Container Platform 4 openshift4/ose-powervs-block-csi-driver-rhel9
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
1 mo ago

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CNA 4.0 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Affected products

  • Google cel-go

Classification

Weakness
  • CWE-789 Memory Allocation with Excessive Size Value

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.