CVE-2023-49087
No exploitation reported by the sources we read.
- Published2023-11-30
- Fixed in1.6.12
- WeaknessCWE-345
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
xml-security is a library that implements XML signatures and encryption. Validation of an XML signature requires verification that the hash value of the related XML-document matches a specific DigestValue-value, but also that the cryptographic signature on the SignedInfo-tree (the one that contains the DigestValue) verifies and matches a trusted public key. If an attacker somehow (i.e. by exploiting a bug in PHP's canonicalization function) manages to manipulate the canonicalized version's DigestValue, it would be possible to forge the signature. This issue has been patched in version 1.6.12 and 5.0.0-alpha.13.
Timeline
dates in UTC- 2023-11-3006:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-49087?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-49087?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
OSV · NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.6 | ≥ 1.6.11, < 1.6.12 | 1.6.12 | OSV |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 5.0 | = 5.0.0 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.6 | = 1.6.11 | no fix published | NVD |
1 more product in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
xml-security: insufficient verification of data can lead to signature forging
xml-security-c as a component of Red Hat JBoss Enterprise Application Platform 6
Fix
- Update simplesamlphp/xml-security to 1.6.12
- No fix planned, says the vendor Red Hat Product Security CVE-2023-49087 · 1 productOut of support scope
Advisories and patches
- github.comPatch
- github.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- CNACVSS 3.16.8read 2026-10-23
- NVDCVSS 3.17.5read 2026-10-23
- CNAweakness (CWE)CWE-345read 2026-10-23
- FIRST EPSSEPSS score0.2 %2026-10-23
- OSVaffected packages—
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Published
- 2023-11-30
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2023-49087?
Is CVE-2023-49087 actively exploited?
What is the CVSS score for CVE-2023-49087?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.