SSRF (Server-Side Request Forgery) in oras.land/oras-go/v2 (CVE-2026-85732)
Summary
SSRF in oras.land/oras-go/v2 (CVE-2026-85732). Risk of unauthorized operations or information disclosure. Exploitable via Link. Mitigation: upgrade to 2.6.2 or later.
Original description
The description as published by the source.
Summary
oras-go's pagination helper parseLink() in registry/remote/utils.go follows the Link response header from a registry without validating the URL's host or scheme. When a malicious registry returns a Link header containing an absolute URL pointing to an arbitrary host (e.g., a cloud metadata endpoint), the client makes GET requests to that host from the victim's network.
This affects all pagination-based listing operations: Tags, Referrers, and Repositories (catalog).
Root Cause
parseLink() at registry/remote/utils.go:54 calls resp.Request.URL.Parse(link) which, for absolute URLs, returns the absolute URL unchanged. The result is passed directly to the next pagination loop iteration where http.NewRequestWithContext() creates a GET request to the attacker-specified URL. No host comparison, scheme validation, or IP filtering exists between parseLink output and the HTTP request.
Affected Code Paths
registry/remote/repository.go:Tags()callsparseLink()for next page URLregistry/remote/repository.go:Referrers()callsparseLink()for next page URLregistry/remote/registry.go:Repositories()callsparseLink()for next page URL
Impact
Blind SSRF from the victim's network. A malicious registry operator can force any oras-go client that lists tags, referrers, or repositories to issue GET requests to arbitrary internal endpoints:
- Cloud instance metadata endpoints for service discovery and IAM role enumeration
- Intern…
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-85732 has been found in oras.land/oras-go/v2.
Attackers can target a specific entry point like Link over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 4.7/10.
What to do: upgrade oras.land/oras-go/v2 to 2.6.2 or later.
If unsure, ask your IT team or search "oras.land/oras-go/v2 CVE-2026-85732" on the vendor's site.
CVE-2026-85732 (oras.land/oras-go/v2) — CWE-918 / CVSS v3 4.7
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: Link / parseLink
Patched: 2.6.2 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
SSRF (CWE-918) exists in oras.land/oras-go/v2. Attackers reach the vulnerable code path via Link without authentication.
Check the vendor advisory for the affected versions of oras.land/oras-go/v2. Attack surface: Link / parseLink.
Severity: Medium (CVSS 4.7/10). Risk of unauthorized operations or information disclosure.
Update to 2.6.2.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'oras.land/oras-go/v2' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'oras.land/oras-go/v2' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
oras.land/oras-go/v2を grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade oras.land/oras-go/v2 to 2.6.2ステージング環境で 2.6.2 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com
- web github.com
- web github.com