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CVE-2026-25545

Astro is a web framework. Prior to version 9.5.4, Server-Side Rendered pages that return an error with a prerendered custom error page (eg. `404.astro` or `500.astro`) are vulnerable to SSRF. If the `Host:` header is changed to an attacker's server, it will be fetched on `/500.html` and they can redirect this to any internal URL to read the response body through the first request. An attacker who can access the application without `Host:` header validation (eg. through finding the origin IP behi
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:6d352799a95342d6e5ab84022a6561f70c4ac7a722902a1c6fb1c6e7a4ce6162
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"astro","vendor":"withastro","versions":[{"status":"affected","version":"< 9.5.4"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9dcd234e7c18070966780385c997e76e727b1ed1aabc59201e19d9affe45fe50 · sha256:a44a9b31538e9796… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"LOW","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9dcd234e7c18070966780385c997e76e727b1ed1aabc59201e19d9affe45fe50 · sha256:a44a9b31538e9796… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-918","description":"CWE-918: Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9dcd234e7c18070966780385c997e76e727b1ed1aabc59201e19d9affe45fe50 · sha256:a44a9b31538e9796… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/withastro/astro/commit/e01e98b063e90d274c42130ec2a60cc0966622c9","tags":["x_refsource_MISC"],"url":"https://github.com/withastro/astro/commit/e01e98b063e90d274c42130ec2a60cc0966622c9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9dcd234e7c18070966780385c997e76e727b1ed1aabc59201e19d9affe45fe50 · sha256:a44a9b31538e9796… · /containers/cna/references/1
{"name":"https://github.com/withastro/astro/releases/tag/%40astrojs%2Fnode%409.5.4","tags":["x_refsource_MISC"],"url":"https://github.com/withastro/astro/releases/tag/%40astrojs%2Fnode%409.5.4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9dcd234e7c18070966780385c997e76e727b1ed1aabc59201e19d9affe45fe50 · sha256:a44a9b31538e9796… · /containers/cna/references/2
{"name":"https://github.com/withastro/astro/security/advisories/GHSA-qq67-mvv5-fw3g","tags":["x_refsource_CONFIRM"],"url":"https://github.com/withastro/astro/security/advisories/GHSA-qq67-mvv5-fw3g"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9dcd234e7c18070966780385c997e76e727b1ed1aabc59201e19d9affe45fe50 · sha256:a44a9b31538e9796… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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