CVE-2025-12829

MEDIUMNVD 6.26.2—

6.2

An uninitialized stack read issue exists in Amazon Ion-C versions

CVSS v3: 6.2
EG Score: 6.2(medium)
EPSS: 3.5%
KEV: Not listed

Published

November 7, 2025

Last Modified

April 15, 2026

References (3)

ff89ba41-3aa1-4d27-914a-91399e9639e5https://aws.amazon.com/security/security-bulletins/AWS-2025-027/
ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/amazon-ion/ion-c/releases/tag/v1.1.4
ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/amazon-ion/ion-c/security/advisories/GHSA-7mgf-6x73-5h7r

Vendor Advisories for CVE-2025-12829(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

AWS-2025-027
AWS Security Bulletins
CVE-2025-12829 - Integer Overflow issue in Amazon Ion-C

Frequently asked(5)

What is CVE-2025-12829?

CVE-2025-12829 is a medium vulnerability published on November 7, 2025. An uninitialized stack read issue exists in Amazon Ion-C versions <v1.1.4 that may allow a threat actor to craft data and serialize it to Ion text in such a way that sensitive data in memory could be exposed through UTF-8 escape sequences. To mitigate this issue, users should upgrade to version…

When was CVE-2025-12829 disclosed?

CVE-2025-12829 was first published in the National Vulnerability Database on November 7, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-12829 actively exploited?

CVE-2025-12829 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-12829?

CVE-2025-12829 has a CVSS v3 base score of 6.2 (NVD).

How do I remediate CVE-2025-12829?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-12829, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-12829

Explore →

Is Your Infrastructure Affected by CVE-2025-12829?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2025-12829

📅 Published

🔄 Last Modified

🔗 References (3)

📣 Vendor Advisories for CVE-2025-12829(1)

❓ Frequently asked(5)