CVE-2017-2491 json
Use after free vulnerability in the String.replace method JavaScriptCore in Apple Safari in iOS before 10.3 allows remote attackers to exec…
published 2017-06-27 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-11674
- cvss
- 8.8
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 8.0%
- EPSS 8.0% chance of exploitation in 30 days, percentile 94%
- public exploits
- 1
- Exploit-DB
Summary
Use after free vulnerability in the String.replace method JavaScriptCore in Apple Safari in iOS before 10.3 allows remote attackers to execute arbitrary code via a crafted web page, or a crafted file.
Timeline
- First public exploit (EDB-41964)
- Published
Exploit prediction
8.04% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-41964 Apple Safari 10.0.3 - 'JSC::CachedCall' Use-After-Free remote, 2017-05-04
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 8.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-416 Use After Free
References
-
exploit-db.com
/exploits/41964/
exploit
-
support.apple.com
/en-us/HT207617
vendor-advisory
-
zerodayinitiative.com
/advisories/ZDI-17-321
third-party-advisory, vdb-entry
-
securityfocus.com
/bid/98316
vdb-entry, third-party-advisory
Sources
- CVE List CVE-2017-2491
- NVD CVE-2017-2491
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.