Home
» GitHub Advisories
» GHSA-rrc9-mx66-ffcm
Description
daphne before 4.2.2 did not pass maxFramePayloadSize or maxMessagePayloadSize to Autobahn's WebSocketServerFactory. Because Autobahn defaults both values to 0 (unlimited), an unauthenticated remote attacker could send arbitrarily large WebSocket messages or frames, causing excessive memory consumption and a denial of service.
Basic information
Type
unreviewed
Severity
medium Advisory on GitHub
Open advisory ↗ Repository advisory
—
Source code
Not specified Published (advisory)
2026-06-03 15:30:42 UTC
Updated
2026-06-03 15:30:54 UTC
NVD published
2026-06-03
EPSS Score
Score
Percentile
0.07%
22.24%
CVSS Scores
Base score
Version
Severity
Vector
5.3
3.1
—
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
CWEs
CWE id
Name
CWE-770
Allocation of Resources Without Limits or Throttling
cvelogic
Threat Intelligence