CVE-2026-30873

Memory exhaustion via leaked jsonpath token strings

Published Mar 19, 2026 · Updated Mar 19, 2026

Memory leak in OpenWrt before 24.10.6 and 25.12.0-rc1 through 25.12.0 allows attackers to consume memory via crafted expressions. jp_get_token allocates string, label, and regular-expression tokens, then jp_alloc_op copies them into new jp_opcode objects without releasing the original allocations. Exploitation requires high privileges, adjacent access, and active interaction; repeated tokenization progressively reduces available memory and interrupts affected processing.

CVSS severity2.4
Low
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in OpenWrt before 24.10.6 and 25.12.0-rc1 through 25.12.0 allows attackers to consume memory via crafted expressions. jp_get_token allocates string, label, and regular-expression tokens, then jp_alloc_op copies them into new jp_opcode objects without releasing the original allocations. Exploitation requires high privileges, adjacent access, and active interaction; repeated tokenization progressively reduces available memory and interrupts affected processing.

The record

CVE
CVE-2026-30873
Published
Mar 19, 2026
Updated
Mar 19, 2026
Vendor
OpenWrt
Product
OpenWrt
Classifications
CWE-401, T1499
Attack vector
adjacent
Privileges
admin

Timeline

How it unfolded

  1. Mar 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 24.10.6
  2. Affected versionversion=>= 25.12.0-rc1, < 25.12.1

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesadmin

What is affected?

OpenWrt · OpenWrtversion=< 24.10.6; version=>= 25.12.0-rc1, < 25.12.1

Published CVSS scores

2.4GitHubCVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
4.9NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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