Vulnerability in Openwrt
CVE-2026-30873
OpenWrt Project is a Linux operating system targeting embedded devices. In versions prior to both 24.10.6 and 25.12.1, the jp_get_token function, which performs lexical analysis by breaking input expressions into tokens, contains a memory leak vulnerability when extracting string literals, field labels, and regular expressions using dynamic memory allocation. These extracted results are stored in a jp_opcode struct, which is later copied to a newly allocated jp_opcode object via jp_alloc_op. During this transfer, if a string was previously extracted and stored in the initial jp_opcode, it is copied to the new allocation but the original memory is never freed, resulting in a memory leak. This issue has been fixed in versions 24.10.6 and 25.12.1.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.007 (49.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.007 · change: +0.001
Affected products
- Openwrt — versions >= 25.12.0-rc1, < 25.12.1, < 24.10.6
Weakness classification (CWE)
References
- github.com/openwrt/openwrt/security/advisories/GHSA-rcc6-v4r6-gj4m (Vendor Advisory)
- github.com/openwrt/openwrt/releases/tag/v24.10.6 (Release Notes)
- github.com/openwrt/openwrt/releases/tag/v25.12.1 (Release Notes)
Frequently asked questions
- What is CVE-2026-30873?
- CVE-2026-30873 is a medium-severity vulnerability in Openwrt, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 4.9/10. Published 2026-03-19.
- How severe is CVE-2026-30873?
- Medium severity. CVSS v3 base score is 4.9 out of 10.