{"answers":{"affected":"1 open source package ship an affected version, including dcrypt-sign.","exploited":"There is no known exploitation of RUSTSEC-2026-0240 in the wild and no public exploit code.","fix":"Upgrade dcrypt-sign to 2.0.0 or later.","what":"RUSTSEC-2026-0240 is a vulnerability in dcrypt-sign, published on 9 Aug 2026."},"fix_prompt":"Check this codebase for RUSTSEC-2026-0240 and fix it if it is affected.\n\nWhat it is: RUSTSEC-2026-0240 is a vulnerability in dcrypt-sign, published on 9 Aug 2026. \nExploitation: There is no known exploitation of RUSTSEC-2026-0240 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- dcrypt-sign (crates.io): affected from 0.0.0-0; fixed in 2.0.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/RUSTSEC-2026-0240/ (Markdown: https://insights.sbomify.com/RUSTSEC-2026-0240/index.md)","id":"RUSTSEC-2026-0240","markdown":"https://insights.sbomify.com/RUSTSEC-2026-0240/index.md","name":"RUSTSEC-2026-0240","record":{"aliases":["GHSA-7j32-2mpw-c784"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"All published versions of `dcrypt-sign` before 2.0.0 accepted the Edwards\nidentity as an Ed25519 public key. A signature with `R = B` and `S = 1` then\nverified for every message because the challenge term multiplied the identity.\nThe implementation also admitted other noncanonical or small-order inputs.\nConsumers that accepted externally supplied dcrypt Ed25519 keys may therefore\nhave accepted forged authorizations.\n\nVersion 2.0.0 replaces the custom arithmetic with `ed25519-dalek`, uses strict\nverification, and rejects noncanonical, small-order, and non-torsion-free public\nkeys and `R` values, as well as noncanonical `S \u003e= L`. No wrapper around the\naffected verifier is recommended as a complete workaround. Upgrade to 2.0.0 or\nlater, audit registered keys and trust stores, and review historical actions\nauthorized with externally supplied keys.","ecosystems":["crates.io"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":true,"headline":"Ed25519 identity public keys permit universal signature forgery","id":"RUSTSEC-2026-0240","indexable":true,"kev":null,"kind":"advisory","links":{"ecosystem":"crates.io","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"crates.io","fixed":["2.0.0"],"introduced":["0.0.0-0"],"last_affected":[],"package":"dcrypt-sign","purl":"pkg:cargo/dcrypt-sign","source":"RUSTSEC-2026-0240"}],"products":null,"published":"2026-08-09","related":[],"sources":[{"class":"open","licence":"CC0 1.0","name":"RustSec","prefix":"RUSTSEC"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":null,"url":"https://insights.sbomify.com/RUSTSEC-2026-0240/"}