Data disclosure and modification via graphics use-after-free
Published Aug 18, 2026 · Updated Aug 18, 2026
Use-after-free in Mozilla Firefox and Thunderbird Graphics components allows remote attackers to read or alter data via unspecified vectors. Mozilla has not disclosed the shared graphics resource, lifetime transition, or dereference sequence that turns the race into an expired-pointer access. Exploitation requires user interaction and a difficult-to-win timing condition; the published assessment limits impact to reading or altering data without service interruption.
Summary
What happened
Use-after-free in Mozilla Firefox and Thunderbird Graphics components allows remote attackers to read or alter data via unspecified vectors. Mozilla has not disclosed the shared graphics resource, lifetime transition, or dereference sequence that turns the race into an expired-pointer access. Exploitation requires user interaction and a difficult-to-win timing condition; the published assessment limits impact to reading or altering data without service interruption.
The record
- CVE
- CVE-2026-74973
- Published
- Aug 18, 2026
- Updated
- Aug 18, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-362, CWE-825
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 18, 2026CVE publishedPublication date reported by the CVE source.
- Aug 18, 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?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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.
Weakness, pattern, technique
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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