Vulnerability · Published Sep 9, 2026 · Assigned by Google
CVE-2026-83530Uncontrolled Memory Allocation in cel-go
Medium 6.9
In plain English
A medium-severity security flaw in cel-go from Google. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)6.9Medium
Exploit odds (30 days)0.2%top 94.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | golang-cel-cel-go | 0.32.0+ds-1 | DEBIAN-CVE-2026-83530 |
| Debian:13 | golang-github-google-cel-go | no fix listed | DEBIAN-CVE-2026-83530 |
| Debian:14 | golang-github-google-cel-go | 0.30.0+ds-1 | DEBIAN-CVE-2026-83530 |
| Ubuntu:24.04:LTS | golang-github-google-cel-go | no fix listed | UBUNTU-CVE-2026-83530 |
| Ubuntu:26.04:LTS | golang-github-google-cel-go | no fix listed | UBUNTU-CVE-2026-83530 |
| Ubuntu:26.10 | golang-github-google-cel-go | no fix listed | UBUNTU-CVE-2026-83530 |
Affected products (as reported)
Weakness: CWE-789 · Vector: 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