01 Record
CVE-2026-82642
Readest: unsanitized iframe srcdoc attribute in the EPUB sanitizer can lead to arbitrary code execution
HighPUBLISHEDCNA: JFROG
CNA base score8.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
02 Description
Readest: unsanitized iframe srcdoc attribute in the EPUB sanitizer can lead to arbitrary code execution
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 0.66% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 51.2% of scored records. A rank, not a probability.
- NVD base score
- 8.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- NVD analysis status
- Awaiting Analysis. NVD last modified this record on 2026-08-31.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-08-30 13:44Z2 MO AGO
- Last updated
- 2026-08-31 16:45Z1 MO AGO
- Reserved
- 2026-08-30
- Assigning CNA
- JFROG
- Record state
- PUBLISHED
- Severity
- High (CVSS 8.8)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base
- Data version
- 5.2
- Document digest
- be486a549682cdefa6237983f1a9cb02862436408ab6070cf424a8fd4425609c
05 Affected products
VendorProductVersionsPlatforms
06 References
- github.comGHSA-p4x7-pf2c-xrvjhttps://github.com/readest/readest/security/advisories/GHSA-p4x7-pf2c-xrvj
- github.comPR #4762https://github.com/readest/readest/pull/4762
- github.comFix commit 005aa2d6157ahttps://github.com/readest/readest/commit/005aa2d6157a34049bf45641c06861d606a85edb
- github.comRelease v0.11.16 (first fixed release)https://github.com/readest/readest/releases/tag/v0.11.16
07 Remediation
Upgrade to Readest 0.11.16 or later. The fix adds 'srcdoc' to the DOMPurify FORBID_ATTR list and 'iframe', 'object' and 'embed' to FORBID_TAGS in apps/readest-app/src/services/transformers/sanitizer.ts.