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GHSA-8x4m-qw58-3pcx

CriticalCVSS 9.3 / 10
Published Mar 29, 2026·Last modified Mar 29, 2026
Affected Components(0)

No affected components available

Description

Impact

Multiple vulnerabilities were discovered in tempo/charge and tempo/session which allowed for undesirable behaviors, including:

  • Replaying tempo/charge transaction hashes across push/pull modes, across charge/session endpoints, and via concurrent requests
  • Performing free tempo/charge requests due to missing transfer log verification in pull-mode
  • Replaying tempo/charge credentials across routes via cross-route scope confusion (memo/splits not included in scope binding)
  • Manipulating the fee payer of a tempo/charge handler into paying for requests (missing sender signature before co-signing)
  • Bypassing tempo/session voucher signature verification
  • Piggybacking off existing tempo/session channels via settle voucher reuse and weak channel ID binding
  • Performing free tempo/session requests by exploiting channel reopen without on-chain settled state
  • Accepting deductions on finalized tempo/session channels
  • Bypassing payment on free routes via method-mismatch fallback
  • Griefing tempo/session channels via force-close detection bypass (closeRequestedAt not persisted)

Patches

Fixed in 0.4.8.

Workarounds

There are no workarounds available for these vulnerabilities.

Risk Scores
Base Score
9.3

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.

Threat Intelligence
7.8

Exploitation activity has been observed. Apply available patches or mitigations urgently.

EPSS
N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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Critical severity
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