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CVE-2023-4055

HIGH
7.5
CVSS Score
Published: August 1, 2023 at 03:01 PM UTC
Updated: June 17, 2026 at 06:37 AM UTC
3 products affected across 2 vendorsDebian LinuxFirefoxFirefox ESR

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Severity
HIGH7.5
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

Description

When the number of cookies per domain was exceeded in `document.cookie`, the actual cookie jar sent to the host was no longer consistent with expected cookie jar state. This could have caused requests to be sent with some cookies missing. This vulnerability affects Firefox < 116, Firefox ESR < 102.14, and Firefox ESR < 115.1.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
11.012.0
Firefox· Mozilla
95%
v < 116v < 116.0102.0 ≤ v < 102.14115.0 ≤ v < 115.1
Affected range stops below 102.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 115.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 116, so it looks safe — our inference, not a vendor statement
Affected range stops below 116.0, so it looks safe — our inference, not a vendor statement
Firefox ESR· Mozilla
60%
v < 102.14v < 115.1
Affected range stops below 102.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 115.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (8)

Issue TrackingPermissions Required
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1782561
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2023/08/msg00008.html
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2023/08/msg00010.html
Third Party Advisory
Source: [email protected]
https://www.debian.org/security/2023/dsa-5464
Third Party Advisory
Source: [email protected]
https://www.debian.org/security/2023/dsa-5469
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-29/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-30/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-31/

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfoCWE-120

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