CVE-2026-63430

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.55% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 46.0% of scored records. A rank, not a probability.

NVD base score

6.3 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-10-16.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

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.

Published

2026-10-15 18:10Z13 DAYS AGO

Last updated

2026-10-15 20:25Z13 DAYS AGO

Reserved

2026-07-16

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 6.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Weaknesses

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base

Data version

5.2

Document digest

24b41ef2af11573b37589d000c354451cf70fa4ea339077988d07ddcbd091ed7

• github.comhttps://github.com/rust-ammonia/ammonia/security/advisories/GHSA-9jh8-v38h-cvhrx_refsource_CONFIRM
• github.comhttps://github.com/rust-ammonia/ammonia/pull/243x_refsource_MISC
• github.comhttps://github.com/rust-ammonia/ammonia/pull/244x_refsource_MISC
• github.comhttps://github.com/rust-ammonia/ammonia/pull/245x_refsource_MISC
• github.comhttps://github.com/rust-ammonia/ammonia/commit/004bf2cee4288f74a6ee619d589e3e90c24c09cax_refsource_MISC
• github.comhttps://github.com/rust-ammonia/ammonia/commit/7ac3fd3145236f28857eeecbadb544c8659cba31x_refsource_MISC
• github.comhttps://github.com/rust-ammonia/ammonia/commit/b51bf4f9749ed3cd518330105f20a2c39c9ee274x_refsource_MISC
• github.comhttps://github.com/rust-ammonia/ammonia/releases/tag/v3.3.2x_refsource_MISC
• github.comhttps://github.com/rust-ammonia/ammonia/releases/tag/v4.0.2x_refsource_MISC
• github.comhttps://github.com/rust-ammonia/ammonia/releases/tag/v4.1.3x_refsource_MISC
• ivan09999.github.iohttps://ivan09999.github.io/ammonia-mxssx_refsource_MISC
• rustsec.orghttps://rustsec.org/advisories/RUSTSEC-2026-0193.htmlx_refsource_MISC