CVE-2017-7797: Mozilla Firefox vulnerability

CVE-2017-7797: Response header name interning does not have same-origin protections and these headers are stored in a glob...

Response header name interning does not have same-origin protections and these headers are stored in a global registry. This allows stored header names to be available cross-origin. This vulnerability affects Firefox < 55.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 5, 2024, 16:12 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2017-7797 is a Firefox browser flaw where response header names could be stored globally and become visible across origins. That could expose information about what headers another site used, but the provided sources do not show code execution, system takeover, or active exploitation. Exposure is mainly organizations or users still running Firefox versions older than 55. Modern supported Firefox deployments are unlikely to be exposed, but legacy desktops, embedded kiosks, or frozen enterprise images should be checked. Low immediate urgency unless legacy Firefox is still present. The business action is targeted inventory and removal of obsolete browser versions, not emergency incident response. Mitigation focus: Upgrade Firefox to version 55 or a current supported release.; Remove or isolate unsupported legacy Firefox installations.; Review Mozilla advisory MFSA2017-18 for vendor-confirmed remediation details..

Prepared: Jun 7, 2026, 06:44 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jun 11, 2018, 21:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://bugzilla.mozilla.org/show_bug.cgi?id=1334776CVE reference · x_refsource_CONFIRM
https://www.mozilla.org/security/advisories/mfsa2017-18/CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

MozillaFirefoxunspecifiedListed

Weakness

CWE details

No CWE listed

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