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CVE-2026-83530

Uncontrolled Memory Allocation in cel-go

6.9 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
Low

Exploit likelihood

0.16%Unchanged since Sep 10, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.9

Uncontrolled Memory Allocation in cel-go

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.

Record
CVE-2026-83530
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Weakness
CWE-789
Updated
2026-11-02
EUVDEUVD-2026-75041 6.9

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.

Record
EUVD-2026-75041
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-c2gw-4533-c2w3 6.9

A user could provide an expression whose string length is longer than the...

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.

Record
GHSA-c2gw-4533-c2w3
CVSS 4.0
6.9 MediumCVSS: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
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness
CWE-789
Updated
2026-11-02
NVD 6.9

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.

Record
CVE-2026-83530
CVSS 4.0
6.9 MediumCVSS: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
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness
CWE-789
Updated
2026-11-02
OSVBELL-CVE-2026-83530 4.3
Record
BELL-CVE-2026-83530
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02
OSV 6.9

Uncontrolled Memory Allocation in cel-go

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.

Record
CVE-2026-83530
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Weakness
CWE-789
Updated
2026-11-02
Show 11 moreShow less
OSVDEBIAN-CVE-2026-83530 4.3

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.

Record
DEBIAN-CVE-2026-83530
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2026-83530 6.9

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.

Record
UBUNTU-CVE-2026-83530
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02
OSVAZL-100914 No score

CVE-2026-83530 affecting package cert-manager for versions less than 1.12.15-14

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.

Record
AZL-100914
Updated
2026-11-02
OSVAZL-100917 No score

CVE-2026-83530 affecting package cloud-provider-kubevirt for versions less than 0.5.1-9

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.

Record
AZL-100917
Updated
2026-11-05
OSVAZL-100932 No score

CVE-2026-83530 affecting package keda 2.14.1-19

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.

Record
AZL-100932
Updated
2026-11-02
OSVAZL-100935 No score

CVE-2026-83530 affecting package kube-vip-cloud-provider for versions less than 0.0.10-10

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.

Record
AZL-100935
Updated
2026-11-02
OSVAZL-100938 No score

CVE-2026-83530 affecting package kubernetes for versions less than 1.30.10-32

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.

Record
AZL-100938
Updated
2026-11-05
OSVAZL-100944 No score

CVE-2026-83530 affecting package prometheus-adapter for versions less than 0.12.0-12

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.

Record
AZL-100944
Updated
2026-11-05
OSVAZL-100950 No score

CVE-2026-83530 affecting package telegraf for versions less than 1.31.0-33

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.

Record
AZL-100950
Updated
2026-11-02
OSVAZL-111629 No score

CVE-2026-83530 affecting package kubevirt-openvmm 1.9.0-1

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.

Record
AZL-111629
Updated
2026-11-05
OSVopenSUSE-SU-2026:11920-1 No score

grafana-12.4.11-1.1 on GA media

These are all security issues fixed in the grafana-12.4.11-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:11920-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
cert-manager
Azure Linux:3
 before 1.12.15-14
1.12.15-14
cloud-provider-kubevirt
Azure Linux:3
 before 0.5.1-9
0.5.1-9
keda
Azure Linux:3
 through 2.14.1-19 None known
kube-vip-cloud-provider
Azure Linux:3
 before 0.0.10-10
0.0.10-10
kubernetes
Azure Linux:3
 before 1.30.10-32
1.30.10-32
prometheus-adapter
Azure Linux:3
 before 0.12.0-12
0.12.0-12
telegraf
Azure Linux:3
 before 1.31.0-33
1.31.0-33
kubevirt-openvmm
Azure Linux:3
 through 1.9.0-1 None known
kubernetes
Alpaquita:25
 1.35.0-r1 and later None known
calicoctl
Alpaquita:stream
 3.31.3-r0 up to 3.33.0-r0
3.33.0-r0
Show 8 moreShow less
Affected packages
PackageAffectedFixed
kubernetes
Alpaquita:stream
 1.35.0-r1 up to 1.37.0-r0
1.37.0-r0
golang-cel-cel-go
Debian:14
 before 0.32.0+ds-1
0.32.0+ds-1
golang-github-google-cel-go
Debian:13
 All versions, plus listed versions
0.18.2+ds-50.18.2+ds-60.18.2+ds-70.27.0+ds-10.27.0+ds-1~exp1
Show 9 moreShow less
0.27.0+ds-20.27.0+ds-30.27.0+ds-3~bpo13+10.27.0+ds-3~bpo13+20.27.0+ds-40.27.0+ds-50.27.0+ds-60.27.0+ds-70.30.0+ds-1
 None known
golang-github-google-cel-go
Debian:14
 before 0.30.0+ds-1, plus listed versions
0.18.2+ds-50.18.2+ds-60.18.2+ds-70.27.0+ds-10.27.0+ds-1~exp1
Show 8 moreShow less
0.27.0+ds-20.27.0+ds-30.27.0+ds-3~bpo13+10.27.0+ds-3~bpo13+20.27.0+ds-40.27.0+ds-50.27.0+ds-60.27.0+ds-7
0.30.0+ds-1
golang-github-google-cel-go
Ubuntu:24.04:LTS
 All versions, plus listed versions
0.12.5+ds-1
 None known
golang-github-google-cel-go
Ubuntu:26.10
 All versions, plus listed versions
0.27.0+ds-10.27.0+ds-30.27.0+ds-4
 None known
golang-github-google-cel-go
Ubuntu:26.04:LTS
 All versions, plus listed versions
0.18.2+ds-50.18.2+ds-70.27.0+ds-1
 None known
grafana
openSUSE:Tumbleweed
From an advisory covering 8 CVEs
 before 12.4.11-1.1
12.4.11-1.1

History

History
RecordedChangedSources
affected
factsOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-83530 is a medium vulnerability (CVSS 6.9) in Google Cel-go, published September 9, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.16%, the 5th percentile. Fixed in cert-manager 1.12.15-14.

References

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