CVE Explorer
CVE-2026-59728
Astro is a web framework for content-driven websites. In versions 1.0.0 through 4.0.18, the source.title and enclosure.type item fields in packages/astro-rss/src/index.ts are interpolated directly into XML template strings without XML-character escaping before being parsed by fast-xml-parser. Both fields are validated only as z.string(), placing no restriction on XML special characters. An attacker who controls these values can inject arbitrary XML into the generated RSS feed: a value containing
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":">= 1.0.0, < 4.0.19"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:84f397caebbb89f6b4c06b55cddc1bf8802c33764e62b1285a4beb839ad4f632 · sha256:a83fddb138efa4ea… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:84f397caebbb89f6b4c06b55cddc1bf8802c33764e62b1285a4beb839ad4f632 · sha256:a83fddb138efa4ea… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-91","description":"CWE-91: XML Injection (aka Blind XPath Injection)","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:84f397caebbb89f6b4c06b55cddc1bf8802c33764e62b1285a4beb839ad4f632 · sha256:a83fddb138efa4ea… · /containers/cna/problemTypes/0/descriptions/0
Source references
5 source assertions{"name":"https://github.com/withastro/astro/commit/fbcfa039dfe3d700b239f595a6c55ee35e45bd06","tags":["x_refsource_MISC"],"url":"https://github.com/withastro/astro/commit/fbcfa039dfe3d700b239f595a6c55ee35e45bd06"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:84f397caebbb89f6b4c06b55cddc1bf8802c33764e62b1285a4beb839ad4f632 · sha256:a83fddb138efa4ea… · /containers/cna/references/2
{"name":"https://github.com/withastro/astro/pull/17209","tags":["x_refsource_MISC"],"url":"https://github.com/withastro/astro/pull/17209"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:84f397caebbb89f6b4c06b55cddc1bf8802c33764e62b1285a4beb839ad4f632 · sha256:a83fddb138efa4ea… · /containers/cna/references/1
{"name":"https://github.com/withastro/astro/releases/tag/@astrojs/rss@4.0.19","tags":["x_refsource_MISC"],"url":"https://github.com/withastro/astro/releases/tag/@astrojs/rss@4.0.19"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:84f397caebbb89f6b4c06b55cddc1bf8802c33764e62b1285a4beb839ad4f632 · sha256:a83fddb138efa4ea… · /containers/cna/references/3
{"name":"https://github.com/withastro/astro/security/advisories/GHSA-8j5q-mfj2-5q9q","tags":["x_refsource_CONFIRM"],"url":"https://github.com/withastro/astro/security/advisories/GHSA-8j5q-mfj2-5q9q"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:84f397caebbb89f6b4c06b55cddc1bf8802c33764e62b1285a4beb839ad4f632 · sha256:a83fddb138efa4ea… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/withastro/astro/security/advisories/GHSA-8j5q-mfj2-5q9q"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:84f397caebbb89f6b4c06b55cddc1bf8802c33764e62b1285a4beb839ad4f632 · sha256:a83fddb138efa4ea… · /containers/adp/0/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.