Medium severity · published Sep 9, 2026
CVE-2026-83530
Uncontrolled Memory Allocation in cel-go
4.3
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CE
cel-go · Google
before 0.29.0 · source: vendor
CE
Common Expression Language · Google
before 0.29.0 · source: NVD