CVE-2026-129135

LOW 3.7

picoquic before 2026.11.05.3e2e3d3 Integer Overflow via TIME_STAMP Frame Decoder

CVSS Score

3.7

EPSS Score

0.0%

EPSS Percentile

0th

picoquic before 2026.11.05.3e2e3d3 contains an integer overflow vulnerability in picoquic_decode_time_stamp_frame() that allows remote QUIC peers to corrupt stored timestamps by sending oversized TIME_STAMP values. Attackers on connections negotiating the TIME_STAMP extension can send large values shifted by ack_delay_exponent to wrap the result, corrupting RTT and bandwidth estimation and degrading congestion control.

CWE	CWE-190
Vendor	private-octopus
Product	picoquic
Published	Nov 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Affected Versions

private-octopus / picoquic

0 < 2026.11.05.3e2e3d3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/private-octopus/picoquic/issues/2365 github.com: https://github.com/private-octopus/picoquic github.com: https://github.com/private-octopus/picoquic/commit/ef21278928771a1ace1c6764cf0e5300d61f7d94 github.com: https://github.com/private-octopus/picoquic/pull/2343 github.com: https://github.com/private-octopus/picoquic/releases/tag/v2026.11.05.3e2e3d3 github.com: https://github.com/private-octopus/picoquic/blob/7966b3f6a5f1dc08a844b3bfa0b22b0f8d424736/picoquic/frames.c#L5651 vulncheck.com: https://www.vulncheck.com/advisories/picoquic-before-2026.11.05-3e2e3d3-integer-overflow-via-time-stamp-frame-decoder

Credits

Tristan Madani (Talence Security) Christian Huitema