CVE-2026-103500

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.27% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 19.9% of scored records. A rank, not a probability.

NVD base score

6.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-10-16.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-30 17:15Z28 DAYS AGO

Last updated

2026-10-21 17:24Z7 DAYS AGO

Reserved

2026-09-30

Assigning CNA

mozilla

Record state

PUBLISHED

Severity

Medium (CVSS 6.3)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

Weaknesses

• CWE-122Heap-based Buffer OverflowVariant
• CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

82692b99b05a181cf5d92d8415d8a561a44711befc4e07ec581ae55ad155642e

• bugzilla.mozilla.orghttps://bugzilla.mozilla.org/show_bug.cgi?id=2070267
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2026-101/
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2026-102/
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2026-103/