Integer Overflow Vulnerability in Picoquic by Private Octopus
CVE-2026-129135

6.3MEDIUM

Key Information:

Vendor

Private-octopus

Status
Picoquic
Vendor
CVE Published:
13 November 2026

What is CVE-2026-129135?

The Picoquic product prior to version 2026.11.05.3e2e3d3 exhibits an integer overflow vulnerability in its TIME_STAMP frame decoding function. This flaw enables remote QUIC peers to manipulate and corrupt internal timestamp values by sending oversized TIME_STAMP values, which can be magnified by the ack_delay_exponent. Such manipulation can lead to inaccurate Round-Trip Time (RTT) and bandwidth estimations, compromising the effectiveness of congestion control mechanisms.

Affected Version(s)

picoquic 0 < 2026.11.05.3e2e3d3

References

https://github.com/private-octopus/picoquic/issues/2365
issue-tracking
https://github.com/private-octopus/picoquic
product
https://github.com/private-octopus/picoquic/commit/ef2127...
patch

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Tristan Madani (Talence Security)
Christian Huitema
.