CVE-2026-56865
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Fix transparency log tile verification bypass in golang.org/x/mod/sumdb/tlog
A malicious GOPROXY was previously capable of forging up to two sumdb tiles that allow for a requested module to bypass the GOSUMDB check and persist attacker-controlled module content to a local Go module cache. This attack allows for a malicious GOPROXY to serve malicious module content that cannot be detected by evaluating the transparency log. All tiles are now correctly verified against their parents. In order to determine if you have been affected: rm -r go.sum go.work.sum vendor/ && go mod tidy
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
cmd/go
- Vendor
- Go toolchain
- Product
- cmd/go
- Platforms
- Unknown
- Default status
unaffected- Package
- cmd/go
- Package collection
- https://pkg.go.dev
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 0 | affected | semver | 1.25.13 | Unavailable | None listed |
| 1.26.0-0 | affected | semver | 1.26.6 | Unavailable | None listed |
| 1.27.0-0 | affected | semver | 1.27.0-rc.3 | Unavailable | None listed |
golang.org/x/mod/sumdb/tlog
- Vendor
- golang.org/x/mod
- Product
- golang.org/x/mod/sumdb/tlog
- Platforms
- Unknown
- Default status
unaffected- Package
- golang.org/x/mod/sumdb/tlog
- Package collection
- https://pkg.go.dev
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 0 | affected | semver | 0.40.0 | Unavailable | None listed |