Jawn is an open source JSON parser. Prior to 1.7.0, Jawn's AsyncParser can perform quadratic work when a single JSON token is delivered across many small chunks because each absorb call rescans the incomplete token from the start. A remote attacker who controls untrusted JSON input and its chunk sizes can exhaust CPU resources and cause denial of service in applications using AsyncParser. This issue is fixed in version 1.7.0.
CVE-2026-61814
HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence
This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6%, top 55% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.5
- EG Score
- 7.5(medium)
- EG Risk
- 49(Track)EG Risk 49/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity75% × 45%Exploitation1% × 40%Automatability100% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 1%
- EPSS %ILE
- 45%
- KEV
- Not listed
Published
September 23, 2026
Last Modified
September 23, 2026
Advisory Details (3)
Auto-updated Sep 23, 2026Patch available. Sources: github_release, github, github_commit.
github_release Patch Available
v1.7.0
Patch available: typelevel/jawn v1.7.0
https://github.com/typelevel/jawn/releases/tag/v1.7.0github_commit Patch Available
commit cddcd5e3387c (typelevel/jawn)
Patch available: typelevel/jawn v1.7.0 (contains commit cddcd5e3387c)
https://github.com/typelevel/jawn/commit/cddcd5e3387c356b05953f7b2af103d309687e4bgithub Patch Available
Quadratic parsing effort in AsyncParser · Advisory · typelevel/jawn · GitHub
https://github.com/typelevel/jawn/security/advisories/GHSA-w4cm-gvhj-cgw6Vendor Advisories for CVE-2026-61814(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 6× in last 7d / 6× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-09-24 19:11 UTCEG score recompute
- 2026-09-23 20:22 UTCEG score recompute
- 2026-09-23 19:48 UTCEG score recompute
- 2026-09-23 19:18 UTCEG score recompute
- 2026-09-23 18:49 UTCEG score recompute
- 2026-09-23 18:49 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-61814?
CVE-2026-61814 is a high vulnerability published on September 23, 2026. Jawn is an open source JSON parser. Prior to 1.7.0, Jawn's AsyncParser can perform quadratic work when a single JSON token is delivered across many small chunks because each absorb call rescans the incomplete token from the start. A remote attacker who controls untrusted JSON input and its chunk…
When was CVE-2026-61814 disclosed?
CVE-2026-61814 was first published in the National Vulnerability Database on September 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-61814 actively exploited?
CVE-2026-61814 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 55.4% of all scored CVEs.
What is the CVSS score of CVE-2026-61814?
CVE-2026-61814 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-61814?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-61814, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-61814
Is Your Infrastructure Affected by CVE-2026-61814?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.