9.8

CVE-2025-49710: mozilla firefox Integer Overflow or Wraparound

CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2025-49710CGA-25mf-799m-6f98CGA-prqx-6prp-958v
Published 11-06-2025Last modified 27-07-2026
Open JSON

Vulnerability summary

CVE-2025-49710 is a critical (CVSS 9.8) Integer Overflow or Wraparound vulnerability in mozilla firefox. EPSS estimates a 0.74% chance of exploitation in the next 30 days, higher than 54.1% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.74%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 4
OPENSUSE-SU-2025:15203-1OPENSUSE-SU-2026:11373-1CGA-6J63-444W-FVWHCGA-7PRC-C5HQ-7RFX

Timeline

  1. 11-06-2025
    PublishedVulnerability first disclosed.
  2. 27-07-2026
    Last modifiedVulnerability information updated.

Description

An integer overflow was present in `OrderedHashTable` used by the JavaScript engine. This vulnerability was fixed in Firefox 139.0.4.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.74%

Chance of exploitation in the next 30 days

Percentile

54%

Versus all other CVEs

30-day change

0.00 pp

From 0.74% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.74%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu7 products
  • mozjs102All versions (No fix recorded)
  • mozjs115All versions (No fix recorded)
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
  • mozjs68All versions (No fix recorded)
Chainguard2 products
  • firefox< 139.0.4-r0
  • firefox-esr< 139.0.4-r0
Mozilla1 product
Wolfi1 product
  • firefox< 139.0.4-r0

4 vendors · 11 products

References

5 links