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CVE-2017-7756
A use-after-free and use-after-scope vulnerability when logging errors from headers for XML HTTP Requests (XHR). This could result in a…
Critical9.8EPSS 2.6%
- Published
- Updated
- Reserved
- Assigned by
- mozilla
Description
A use-after-free and use-after-scope vulnerability when logging errors from headers for XML HTTP Requests (XHR). This could result in a potentially exploitable crash. This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Critical9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 2.6% · top 15% of all CVEs (3 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
- Use-after-free and use-after-scope logging XHR header errors
- CWE-416 (opens in a new tab)All about CWE-416 and its CVEs
Affected products
- affected unspecified – < 54
- affected unspecified – < 52.2
- affected unspecified – < 52.2
References (10)
- 99057 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://bugzilla.mozilla.org/show_bug.cgi?id=1366595 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www.mozilla.org/security/advisories/mfsa2017-15/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-3918 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- 1038689 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- DSA-3881 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- RHSA-2017:1440 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2017:1561 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://www.mozilla.org/security/advisories/mfsa2017-17/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www.mozilla.org/security/advisories/mfsa2017-16/ (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2017-7756)Record last updated .