TAILS developers say users can mitigate the severity of the critical vulnerability researchers discovered in the I2P software that s bundled with TAILS with a couple of workarounds, but there is no patch for the bug yet. The developers say that the problem affects versions 1.1 and earlier, which is all of the current versions of the software. The vulnerability that affects TAILS is in the software that comes with the operating system that is an anonymous network without any central infrastructure that encrypts all communications.
Source: https://threatpost.com/tails-team-recommends-workarounds-for-flaw-in-i2p/107422/